Sorry if this is too normie for 8chan, but think of the Mayfield vs. Pacquiao fight. Honestly, who seems more evil/angry, all those Sith things? Definitely Mayfield. Manny was smiling the whole time, he's a loving father, has only said nice things etc. Now, if you watch their fight, Manny FOR SURE had a more aggressive fighting style. He was throwing wild punches all over the place.
My own experience in sports tells me similar things. Aggressive tactics in physical activity doesn't necessarily mean you're absorbed by anger. I have next to nothing to be personally angry about in the world and I was known for being extremely aggressive on the field in rugby