I'm a fan of this show too. I didn't get to watch much of season 4, but I watched nearly all the episodes of seasons 1-3.

My favorite character is Doctor Orpheus, and I love pretty much every episode he ever makes an appearance in. The way his voice actor delivers his lines is hilarious. Love the dramatic flare that he does, even when it's something as mundane as pizza rolls or wearing his windbreaker jacket.

Gah.... All this talk of Adult Swim programming makes me really want to tune in and watch it all again. My tv time has been cut drastically these days, but I'll be sure to watch when the new episodes come on.