In my experience, at least in real life, those dominant alpha male types are jackasses. Every last one of them. They're the dipwads who turn their car radios too loud. They're the idiots who get drunk and cause car accidents. At 20 years old they're jocks and fratboys, and at 40 they're in prison. Meanwhile, the rest of us are busy being productive.
I'd like to see more men who can be genuinely manly, not fake manly alpha-male-to-disguise-his-insecurities manly. There was an episode of the Fresh Prince where Carlton and Will were on a double date, and the girl Will was with was being a complete bitch. Carlton stood up at the table, and chastised her manners. He was quite manly, took control of a problem situation, but wasn't any dumbass poser shit like Rambo.
Muscles and guns aren't any manlier than being a teenager, just more annoying.