I like Pops. His Naivety is hilarious.
Out of the main characters, probably Rigby or Benson. Out of every character to appear on the show, I'd have to say Party Pete.
Rigby
Rigby Free Cake! Free Cake! Free Cake! No Cake. No Cake. No Cake. lol
Benson, because all the times he "drops his gumballs" makes me laugh. And he was awesome in the Stick Hockey episode. 2nd would be Mordecai.
MUSCLEMAN'S MOM! (readies hand for high five from everyone)
Ahh, this is hard. Probably Mordecai or Benson. Benson freaks me out when he turns red...
I like Benson best. Then... Well, I don't know. I like all of them except Skips. He's just kinda boring to me.
Rigby or Skips and he is a yeti which is cool
Mordecai, just look at my avatar! How can anyone not like a 23-year old blue jay with a voice like that? :U