It's possible to like "The Simpsons" and still be disappointed with the current state of the show. I'm very much in the same boat as simpspin - the show is about ten years past its expiration date, but in the '90s it was pure genius.
If this list was made in 1996 or 1997, then I'd agree with Homer making the top spot. At that time, Homer's characterization was absolutely perfect: dim, slow-witted, and impulsive, but still a good-natured guy who tries to do the right thing, even if he doesn't know how. Quite a stark contrast to the loud, obnoxious, self-centered pain magnet he turned into just a few years later and has essentially remained ever since.