Hmm, I'd probably say either season 1 or 2, mainly because they've been showing season 3 a lot here recently and 1 and 2 just seem more fresh to me now.^^; It's hard for me to choose though because I think every season has a few episodes that I love, some that I like and a few that I hate. Of course, I haven't seen any of season 4 yet (though I'm dying to) so I can't really say anything about that.
