Which character pisses Du off the most?

Muscle Man!

Benson's boss, the one that always calls him Beanton. -____-

muscle man.....i hate the way he keeps makin fun of my fave. characters rigby and mordecai....i also hate how he thinks he's SO funny cuz of his lame "my mom!!!" jokes.....he makes me mad...

muscle man, those mom joke get on my nerves

ffffff Benson, Susan, Benson's boss/pops dad.....sometimes rigby, but hes still one of my favorites. :)

Yep, Benson's Boss/Pop's dad.

Also, many of the antagonists on the Zeigen that only appear, like, once.