I think his cat's breath smells like cat food. And that's unpossible. I too have a tough time choosing my favorite character. Although I love Professor Frink and Lenny, Groundskeeper Willie is freakin hilarious.
It is hard to chose, because they are all great and each of them bring something special, that wouldnt be the same without them.. Milhouse rules though..
I'd have to say Homer, though Maggie is pretty funny, especially in the episode where she has the nail gun and goes after Homer.
i forgot Chief Wiggum! "How do we get out of this hole? I know! well dig our way out! NO, no! dig UP stupid" priceless...
I like the whole simpson family... I really dislike that spanish bumble bee dude and disco stu....i dont know why but they get on my nerves, I just cringe and change the channel every time they come on.
How is it that nobody is giving love to Otto, the busdriver dude? He is the best. I think the worst dude is that reverend lovejoy, that guy is so annoying.