Man: occasionally
Dude: rarely
Bro: even rarerly
Brother: as part of something else, like 'Ain't it the truth, brother' (not using it on its own): rarely
Mate: occasionally
Person: sometimes, when I'm trying to convey that I'm dissapointed by someone ignoring me. It never works. They just look at me like I'm a stupid person. Well, they are stupid, fuck them.
Human: when I pretend I'm an evil robot overlord (I'm totally not >.>)