I kinda liked Everbody Loves Raymond. I've only seen it on syndication. Other than the finale, I don't think I've ever seen it on it's regular channel. Yeah, Raymond's a complete dope, but I think what appeals to me is that my family is about as dysfunctional as his, so I can relate.
I thought Seinfeld was funny, just as funny as a bunch of the other sitcoms these days. Wasn't the greatest show ever, but it had it's moments. The one show I couldn't get into was Curb Your Enthusiasm. People have been raving about it, I rented the first season, and didn't find anything on the first disc to make me keep watching.
Had to jump in when Ian mentioned ER. That show has turned to complete crap in the last two years or so. Used to love it, now it sucks.