Being an adrenalin junkie who enjoys dangerous activities isn't what the airlines want.
Really?
I've never seen evidence of this.
Nice stable personality, someone who can be trusted with a $500+ million insurance risk. Someone who isn't interested in seeing how far he can push the limits, someone who won't do anything stupid with one of the companies aircraft and end up on the news.
Someone who won't go and do a low fly past with company executives on board, as a former CX pilot found out.
Be as close to the "profile" as you can be when going for an airline job. Navy blue suit, white shirt, red tie, black shoes, neat haircut, clean shaven, plays golf etc etc etc.