First and foremost, Blackjack is a practical man.
He does the right thing. Not necessarily the good thing, nor the easy thing, nor the expected thing, but the efficient thing. The *correct* thing.
Sophisticated and arrogant, both arguably justified, Blackjack believes in Accelletrix's core mission of elevating the human species through the conquest of the Shadowside. He knows his place is with the grunts at the front lines, dealing with the issues of the day, and he's made peace with that. He's good at what he does, his actions serve a higher purposes, and enjoys the thrill of a job well done.