I've learned through experience of playing different characters, some of whom were jerks, that when you play a character who is pretentious or obnoxious, in any way, it's important to knock them down a peg.
Jonah HillWhen you go out to make something, you want it to be great. You need to put a bubble around that, so no one can get into the force field and change what you're setting out to make. That's all us being producers is doing, is allowing our power to protect the integrity of what you're doing.
Jonah Hill