I included my favorite 7 episodes from each Season of both shows, except the 1st Buffy Season. (I cheated a little, and stuck the 2-parters together).

Buffy

Season 1- Welcome To The Hellmouth/ The Harvest, Witch, Never Kill A Boy On The First Date, Angel, Prophecy Girl

Season 2- When She Was Bad, Halloween, Lie To Me, Suprise/Innocence, Passion, I Only Have Eyes For You, Becoming I and II

Season 3- The Wish, Gingerbread, Consequences, Doppelgangland, Choices, The Prom, Graduation I and II

Season 4- The Freshamn, Living Conditions, Something Blue, Hush, Goodbye Iowa, This Year's Girl/Who Are You?, The Yoko Factor/Primeval,

Season 5- Checkpoint, Blood Ties, The Body, Tough Love, Intervention, Spiral, The Weight Of The World/ The Gift

Season 6- Bargaining I and II, Once More With Feeling, Tabula Rasa, Hell's Bells, Seeing Red, Villains, Two To Go/Grave

Season 7- Selfless, Conversations With Dead People, Potential, Storyteller, Dirty Girls, End Of Days, Chosen


Angel

Season 1- I Will Remember You, Hero, Parting Gifts, Expecting, Five By Five/Sanctuary, Blind Date, To Shanshu In L.A.

Season 2- Darla, The Trial, Reunion, Redefinition, Epiphany, Disharmony, There's No Place Like Plrtz Glrb

Season 3- Offspring, Quickening, Lullaby, Birthday, Sleep Tight, Benediction, Tomorrow

Season 4- Spin the Bottle, Habeas Corpses, Salvage, Release, Orpheus, Peace Out, Home

Season 5- Damage, You're Welcome, Smile Time, A Hole In The World, Shells, Underneath, Origin, Not Fade Away


Seasonal Rank

Buffy: 2, 5, 3, 6, 4, 7, 1

Angel: 2, 3, 4, 5, 1