Anime is filled with big and tough heroes and villains, but some are bigger and tougher than all the rest. To be a memorable and impressive one, you've got to be strong, forceful, authoritative, muscly, and preferably sport some kind of impractically large hair - either on your head, chi, or upper lip. It doesn't hurt to be popular with the ladies either.
Basically, you've got to be the most macho man you can be. Shonen anime in particular attracts a lot of this archetype, whether they be handsome leading men aiming to be the undefeated champions of the world or conniving bad guys hoping to rule the galaxy. Bonus points if you can do it all shirtless, too.