Went through season 3 a couple of months ago. I Was gunna make a blog post about it, but scrapped it. So this is where I got that list from. I edited some of the grades. (some up eg. Bart the Murderer, some down eg. Saturdays of Thunder).
Stark Raving Dad - B+
Mr. Lisa Goes to Washington - B+
When Flanders Failed - C+
Bart the Murderer - A-
Homer Defined - B/B-
Like Father, Like Clown - B-/C+
Treehouse of Horror II - C+
Lisa's Pony - B+/A-
Saturdays of Thunder - B/B+
Flaming Moe's - B/B+
Burns Verkaufen der Kraftwerk - A
I Married Marge - dunno.
Radio Bart - A
Lisa the Greek - A-
Homer Alone - B
Bart the Lover - A-
Homer at the Bat - A-
Separate Vocations - A+
Dog of Death - B+
Colonel Homer - A
Black Widower - B-
The Otto Show - B
Bart's Friend Falls in Love - A-
Brother, Can You Spare Two Dimes? -B
Good season but to me it just feels a bit forgettable on the whole. It just doesn't seem to peak as much as the other seasons. 2, 6, 7 are definitely better. 5 maybe. The rest are about equal in quality (4, 8).
I think there's a definite difference between the first half (roughly) and second. Once it hits its stride, around "Krafterwerk" in terms of placing, it definitely picks up and establishes its own style. I'd say it's equal to if not very very marginally better than 4.
EDIT: Also, I'm the only person not to rate Flaming Moe's 10/10 or A+ so far......... I can't help but feel like I'm missing something