People who complain about how much Bendis's writing sucks yet continue to read everything he writes make me laugh.
I also read the Ultimate stuff as a completist thing.
Anything else...after Alias and Daredevil (and, to a lesser extent, New Avengers), he deserves a chance to at least give his stuff a try. Not everything he does sucks. It's just that the stuff that does suck sucks on a cosmic level.