Blonde: who needs it?

I've been thinking recently (OK, for about a year) about dying my hair. However, I don't want to dye all of it as it is really a pretty color. So I'm thinking about dying just the bottom half some crazy color. But I can't decide.

Pink? Orange? Purple? Blue? Brown? Black? Should I bleach part of it white?

Not green, I'll tell you that. But I would like some feedback. What do you guys think?