Mostly Mexicans(MAB,EM etc..) Once heard a quote that these guys would be pissed off if you don't hit back. Mexican pride gotta love it. Pac, Hatton, Valero, Shane and Hopkins (despite of age). And oh of course Duran.
Luis Alberto Lazarte, that guys loves to fight. Boxing isn't his forte but fighting...now thats another matter, biting, low blows, proper rough house stuff...
Pac is always happy on his way to the ring. I also think Mayorga and Marquez look forward to fighting and Hopkins obviously loves it