I blame my mother for the following: Sex and the City, Gilmore Girls, Desperate Housewives. She loves them and every so often I'll watch an episode with her. Though the only one she really likes is Gilmore Girls. In each show, there's a female character I really hate (Miranda, Lorelei, Bree) and a character I really like (Charlotte, Rory, Susan).
Ditto 'I Love Lucy,' but I'd say since I've seen (and remember) every episode, I have to take the blame for it.
And embarassing shows that I only have myself to blame: Doug, Rugrats, Muppet Babies. I don't watch much tv, but I'll sometimes catch an episode now and then.