Um.. To be honest I can't pick only one episode as my fave. I can hardly do it with Futurama, but not with the Simpsons XD Definetly one of my fave is "Who shot mr. Burns part one and two", «One Fish, Two Fish, Blowfish, Blue Fish» , «Bart Sells His Soul» ,"Lisa's Wedding",«Raging Abe Simpson and His Grumbling Grandson in “The Curse of the Flying Hellfish” » "Rosebud" «'Round Springfield». But I'm sure I still forgot something XD
Well I think that everyone can pick his own best season[s] Because it's all depends on personal taste. I can't accurately say which season is best I like seasons 6 and 7, but 5 is also great. There is almost no weak episodes between seasons 4-8.
for me first season is a bit hard to watch, but second is okay However I can't really enjoy first three seasons because of ukrainian voicing. Those three seasons have not a very good voice actor in the team (the rest are great). After third season they changed him to one amazing guy - Yuriy Kovalenko and everything become beautiful. He's great. This team wasn't ever changed - from season 3 to 24. For me the Simpsons are not the Simpsons without them.
It's almost the same here. The first season is unliked because of the "messy" animation and Homer's voice is weird sounding and Dan Castelanetta changed it at the start of the second season to what we have now.
Mr. Burns and Moe were voiced by Chris Collins for the first one or two episodes. Chris Collins was also the voice of Cobra Commander in the G.I. Joe cartoon back in the 1980's. His son, Ben, was an online friend of mine back in the mid 1990's. Sadly, Ben informed me his dad passed away in 1994 from an illness.