Eh, girls don't really get cool nicknames. <_< I just get cutesy variations on my name that I'm too polite to reject. =P
Although, that being said, a group of people I'm sort of friends with basically just know me as, "Hot Random", which is kind of self-explanatory. oO And flattering. =D Essentially, it boils down to the fact that, even though they didn't know me, they let me crash at their place, because they found me nice to look at.
The only other thing that comes close to 'nicknames' like that are really just inside jokes between my friends and I, which we all use to refer to each other, and we've completely outgrown most of those.