The first season has Jane Lynch, who is EASILY the weakest part about the show. She never actually plays a character, just a "wacky" improv performer reciting lines. You have to put the joke ahead of yourself in comedy and she fails miserably at that.
I also never thought Ron was that great but he wasn't painful.
The real stars are Roman and Kyle. Henry and Casey are decent and manage to be amusing with a relationship without going all Jim & Pam.
In season 2 Jane Lynch gets replaced with Megan Mullally (Sarah Palin clone) who is much much better.
The only disappointment was the final episode. Jane Lynch comes back and Roman is locked in a closet stoned the whole time.