I get man-crushes. I wouldn't go gay for them, although who cares, but it's kind of an idolize thing.
Two here.
And why.
Michael Biehn's characters are always so bad-ass and he's got the no-nonsense male features that work so well.
Keanu Reeves, I believe, is an admirable human being, and any guy who can get hero-worship from Charlize Theron has my undying admiration.
Honorable mention:
Never seen him in anything where his acting wasn't stellar and he wasn't completely compelling. (For a very entertaining, little-known movie, check out "Inside Man.")