Now in its 6th Edition, the Hero System is a generic role-playing system designed to give players and GMs the means to create any character they want, and yet keep that character balanced against other characters and threats. It's a point-build system based around the concept of special effects. The rules are written generically, allowing the gamer himself to decide exactly what a power or ability does, and then define it in game terms.
As a player, you might decide, "I want my character to be able to fly - he has wings." Instead of just writing down whatever the game's designers say "Wings" do, you decide how to represent Wings in game terms, using Flight and some Power Modifiers. A character with the ability to fly by manipulating gravity would build his power using Flight in different ways, since gravity manipulation and wings, while both enabling a character to fly, work differently.
The result of this is that you aren't constrained by what the game's designers think. You apply your own creativity and the unmatched flexibility of the HERO System to create what you want.