Since I pay my hard earned money to watch fights, it's fighting style for me. I want to see fighters who try to finish fights. Of course some of the best fights have gone to decisions, but the reason they were great is because both guys were intent on getting the most dominant and indisputable win possible, and that is a finish.
I don't care much about personality. I hate Jon Jones' personality but I'll never miss one of his fights! Now if he'd just keep that fist balled on the PPV's I buy...
Technique obviously, I don't want to watch sloppy, amateur looking fights on a card I spend money on.
Nationality or any of that other stuff doesn't do shit for me. If a fighter is fun to watch, they're fun to watch.