what's your favorite show for each network of all time. You can include cable as well.

ABC- Roseanne
NBC- Seinfeld
CBS-I Love Lucy
Fox- Married With Children
PBS-Arthur
MTV- Teen Wolf
HGTV-Property Virgins
Nickelodeon-Doug
Disney Channel-Lizzie McGuire
The WB-Dawson's Creek
UPN- Everbody Hates Chris
TLC-Cake Boss
Bravo-Real Housewives of Orange County
Showtime-Dexter

ABC - The Avengers
NBC - T.H.E. Cat
CBS - WKRP in Cincinnati
PBS - Monty Python's Flying Circus
Fox - The Simpsons
HBO - Boardwalk Empire
Showtime - Dexter
USA - Night Flight
Comedy Central - Mystery Science Theater 3000
Sci-Fi - Mystery Science Theater 3000
Cartoon Network - Space Ghost Coast to Coast
AMC - Breaking Bad
FX - Justified
Discovery - Survivorman

ABC - The Six Million Dollar Man
CBS - The Twilight Zone (1959)
NBC - St. Elsewhere
FOX - Strange Luck
PBS - Austin City Limits
MTV - Beavis & Butthead
USA - Night Flight
Comedy Central - South Park
HBO - First & 10

These are the first ones that come to mind:

ABC: Family Matters
CBS: I Love Lucy
NBC: Days of our Lives (especially in the 90's and early 00's---those storylines were awesome!)
FOX: MADtv (seasons 1-9 were the best)
WB/UPN: Buffy the Vampire Slayer

I don't really watch many cable channels.

cbs person of interest intelligence Hawaii Five-0 Elementary the Mentalist & NCIS: Los Angeles

abc Agents Of S.H.I.E.L.,D what would you do? shark tank resurrection whip out& The Goldbergs
tnt murder in the first , Perception the closer & major crimes
nbc America's Got Talent, Grimm and cross bones
mtv teen wolf
abc family kaly xy
usa suits , covert affairs & white collar
since channel through the warm whole with Morgan free man out rages acts of since Close Encounters & the unexplained files

history channel pawn stars American pickers & American Restoration
A&e storage wars panic 911, banter kings, shipping wars & long mire

ABC - Laverne & Shirley (tough choice here)
CBS - The Price is Right
FOX - Married With Children
NBC - Frasier (also a tough choice)
UPN - Everybody Hates Chris
PBS - Mister Rogers Neighborhood
Comedy Central - South Park
The WB - Animaniacs
MTV - Celebrity Deathmatch
Game Show Network - Whammy! The All New Press Your Luck
Nickelodeon - Hey Arnold
Cartoon Network - Dragon Ball Z

PBS - Mister Rogers Neighborhood

I'll ditto this! Love me some Lady Elaine!

I'll also add another network to my list:
GSN: Lingo (the Chuck Woolery version---I LOVE this show, I wish they'd make new ones and bring back Chuck. I really disliked the new version hosted by Bill Engvall.)

ABC - Bewitched
CBS - Maude
NBC - Mama's Family

NBC: ER
ABC: Roseanne
CBS: All In The Family
FOX: Beverly Hills, 90210
The WB: Dawson's Creek
UPN: Buffy the Vampire Slayer
The CW: Arrow
HBO: Curb Your Enthusiasm
AMC: The Walking Dead
Sydication: Star Trek: TNG / DS9
MTV: Total Request Live (TRL)

NBC-Night Court
CBS-Murphy Brown
ABC-Three's Company
WB-Unhappily Ever After
Fox-Arrested Development

That's my sitcom list.

Drama list

NBC-Law and Order
CBS-Dallas
ABC-General Hospital
Fox-New York Undercover

ABC-Bewitched
CBS-Here's Lucy
NBC-Sanford And Son
FOX-Married With Children
Nickelodeon-Drake & Josh

ABC - Full House (I really liked it as a kid, but I'm now very "meh" towards it)
CBS - King of Queens (probably my all time favorite show)
FOX - Family Guy
NBC - Friends

AMC - Breaking Bad
Disney Channel - That's So Raven (those were the days)
Netflix - House of Cards
Nickelodeon - Rugrats / The Amanda Show (ahhh, to be a kid again)
Spike - 1000 Ways to Die
TNT - Rizzoli and Isles
USA - In Plain Sight

NBC: Freaks and Geeks
ABC: Three's Company
CBS: Gomer Pyle, U.S.M.C.
FOX: The X-Files
The WB: Buffy the Vampire Slayer
UPN: Star Trek: Enterprise
The CW: Supernatural
AMC: The Walking Dead
Syndication: Star Trek: The Next Generation
MTV: Remote Control
AMC: The Walking Dead
A&E: Bates Motel
Nickelodeon: You Can't Do That On Television
Cartoon Network: Thundercats (2011)
HBO: Fraggle Rock
PBS: Sesame Street
Showtime: Penny Dreadful
BBC Two: Life's Too Short
ITV: The Tomorrow People (1970s series)
E4: Misfits

CBS-All in the Family
ABC-Roseanne
NBC-Seinfeld
USA- Monday Night Raw
FOX-The Simpsons
WB-The Gilmore Girls
UPN-WWF Smackdown
MTV-Beavis and Butthead
HBO-The Sopranos

CBS
Best Drama Early Edition/Diagnosis Murder
Best Sitcom WKRP in Cincinnati
Best Game Show Dick Clark Pyramids

ABC
Best Drama Once Upon a Time
Best Sitcom Benson

NBC
Best Drama Fame
Best Sitcom Frasier/Family Ties

FOX Beyond Belief: Fact or Fiction/Greed

The WB 7th Heaven/Gilmore Girls

Syndication Star Trek: the Next Generation

USA Monk

TNT Leverage

GSN Grand Slam

Canada Corner Gas

UP Heartland

Britcom Yes, Minister/Yes, Prime Minister

ABCFamily Switched at Birth

BBCAmerica Atlantis

NBC- Seinfeld
ABC- Home Improvement
CBS- Everybody Loves Raymond
FOX- Malcolm in the Middle

ABC- Happy Days
CBS- Daniel Boone
NBC- Cheers
Fox- The Simpson's
Nickelodeon- Rugrats

NBC- Drama- Law and Order: Special Victims Unit
NBC- Comedy - The Golden Girls
CBS- The Andy Griffith Show
ABC- Happy Days
MTV- Remote Control & Singled Out
TruTV- South Beach Tow
Spike- MXC (Most Extreme Elimination Challenge)
Nick- Game Show- Double Dare
Nick- Comedy - My Brother And Me
G4- Sasuke/Ninja Warrior (Japanese Version)
TLC- MY Strange Addiction/Extreme Cheapskates
ABC Family- 25 Days of Christmas/13 Nights of Halloween
USA- Dance Party USA
WB- The Parent 'Hood/The Jamie Foxx Show
CW- 7th Heaven
Fox- Married...With Children
PBS- The Joy of Painting with Bob Ross
OWN- The Haves And The Have Nots

Impossible question

NBC - Mama's Family
ABC- The Wonder Years
CBS- The Andy Griffith Show

ABC: Monday Night Football
CBS: The Price is Right(only the first 20 years with Bob Barker hosting it)
NBC: The Tonight Show starring Johnny Carson(Hollywood years)
FOX: The Simpsons
PBS: Great Performances & The Joy of Painting
Syndication: Love Connection(Woolery)

ESPN: Sportscenter
HBO: Fraggle Rock & Def Comedy Jam
Nickelodeon: Double Dare(1986-1993 incarnation)
MTV: Total Request Live(Carson Daly era)
BET: Rap City & Video Soul/Planet Groove
TNN: TNN Country News(Debra Maffett era) & Video Country
Discovery Channel: Home Matters & Wild Discovery
USA: USA Up All Night
TLC: A Wedding Story & Trading Spaces
E!: Fashion Emergency
TNT: NBA on TNT
TBS: Starcade
Univision: Sabado Gigante
Cartoon Network: Courage the Cowardly Dog, Dragon Ball Z & Gundam Series
BBC America: Doctor Who
Disney Channel: EPCOT Magazine & Bug Juice(1998 version)
CNN: Showbiz Today(pre-1993 era)

CBS - I Love Lucy (Although I never watched it on CBS)
NBC - Star Trek (Also saw it mostly in reruns on local channels)
ABC - The Odd Couple
PBS - Nature

By the time the rest of the networks came along I had pretty much stopped watching.

CBS:Wanted: Dead or Alive
NBC: Petrocelli
ABC: The Streets of San Francisco

ABC- Monday Night Football, China Beach, Thirtysomething

NBC- St. Elsewhere, Sale of The Century, Wheel of Fortune, Days of Our Lives, Another World, The Doctors, Santa Barbara, Concentration(with Hugh Downs, Bob Clayton and Alex Trebek), The Hollywood Squares(with Peter Marshall)

CBS- The Price is Right, Press Your Luck, Guiding Light, The $25,000 Pyramid, The Joker's Wild, Gambit, Love is a Many Splendored Thing

Syndication- American Gladiators, Jeopardy, Star Search, On Scene: Emergency Response, Star Trek: The Next Generation

ABC------ The Rifleman (Bewitched runner-up)
CBS------ All In The Family
NBC------ Bonanza
Fox------- The Simpsons

NBC - The Facts of Life (mostly the Eastland years; the show got weird after that)
ABC - Roseanne
CBS - I Love Lucy
DuMont - Captain Video and His Video Rangers
NTA - How to Marry a Millionaire
PBS - Doctor Who
Fox - The Simpsons (first eight seasons only)
The WB - Buffy the Vampire Slayer
UPN - Buffy the Vampire Slayer
The CW - Whose Line
Syndicated - The Muppet Show

Nickelodeon - Hey Dude
BBC America - Doctor Who
Comedy Central - Mystery Science Theater 3000
Sci-Fi Channel - Mystery Science Theater 3000
E! - some of the E! True Hollywood Story episodes were very well done
Biography - some of the biographies were very good
HBO - Game of Thrones
MTV/VH1- When they actually showed music videos

Netflix - Stranger Things
Hulu - The Handmaid's Tale