My top 5 classic game shows are

Match Game
Hollywood Squares
Tic Tac Dough
The Jokers Wild
High Rollers

My top 5 game shows of the present day are

Are you Smarter than a 5th Grader
Deal or No deal
1 vs 100
The New I've Got A Secret
Don't Forget The Lyrics

The only current game show I watch is T.P.I.R and that's rare.

Past:

What's My Line?
Match Game
Concentration
The Joker's Wild
I've Got a Secret

Oooohhh, I love game shows. :)
My top 5 from the past in no particular order:
Match Game
Family Feud
What's My Line
I've Got A Secret
Blockbusters
Card Sharks
To Tell the Truth
Beat the Clock
(Is that 5 yet??) :)

Current:
1 vs 100
Who Wants to be A Millionaire
The Price Is Right
(Yeah, they don't make 'em like they used to)

Password
Pyramid
Match Game
Card Sharks
The Price Is Right

The Price Is Right
Pyramid
Match Game
Card Sharks
Hollywood Squares

PAST:
1. Remote Control
2. Hot Potato
3. Name That Tune (Lange)
4. Classic Concentration
5. Supermarket Sweep

PRESENT:
1. Jeopardy!
2. The Price Is Right
3. Deal or No Deal
4. Merv Griffin's Crosswords
5. 1 vs. 100

Match Game
The Newlywed Game
The Dating Game
Family Feud
Hollywood Squares

Classic:
Sale of the Century (SYN)
The Price is Right (Barker 80s)
Classic Concentration
Family Feud (Dawson)
Card Sharks (Eubanks)

Current:
Jeopardy
The Chase (ABC)
$100,000 Pyramid (ABC)
Press Your Luck (ABC)
Who Wants to be a Millionaire

1. Concentration, 2. $10-20,000 Pyramid, 3. Jeopardy, 4. '60s NBC Match Game, 5. GE College Bowl.

Currently, only Jeopardy.

Long Past:

Jeopardy
Hollywood Squares
What's My Line
The Match Game
To Tell the Truth