I've rewatched Seasons 2 & 5 of "The Simpsons" and here be my ratings for each episode:
Season 2:
Bart Gets an F - B+
Simpson and Delilah - B
Treehouse of Horror - A+
Two Cars in Every Garage and Three Eyes on Every Fish - B
Dancin' Homer - B-
Dead Putting Society - A-
Bart vs. Thanksgiving - B-
Bart the Daredevil - B+
Itchy & Scratchy & Marge - A-
Bart Gets Hit by a Car - B
One Fish, Two Fish, Blowfish, Blue Fish - B+
The Way We Was - A+
Homer vs. Lisa and the Eighth Commandment - A
Principal Charming - B
Oh Brother, Where Art Thou? - A-
Bart's Dog Gets an F - B-
Old Money - B-
Brush with Greatness - B
Lisa's Substitute - A+
The War of the Simpsons - B+
Three Men and a Comic Book - A-
Blood Feud - B+
Season 5:
Homer's Barbershop Quartet - A
Cape Feare - A+
Homer Goes to College - A+
Rosebud - A
Treehouse of Horror IV - A+
Marge on the Lam - A-
Bart's Inner Child - B
Boy Scoutz N the Hood - A
The Last Temptation of Homer - A+
$pringfield (or, How I Learned to Stop Worrying and Love Legalized Gambling) - A
Homer the Vigilante - A
Bart Gets Famous - B+
Homer and Apu - A
Lisa vs. Malibu Stacy - A
Deep Space Homer - B+
Homer Loves Flanders - A-
Bart Gets an Elephant - A
Burns' Heir - B+
Sweet Seymour Skinner's Baadasssss Song - A-
The Boy Who Knew Too Much - B
Lady Bouvier's Lover - B+
Secrets of a Successful Marriage - B
As you can tell, Season 5 is my favorite (along with Season 6).