Asp's right here man, you really ideally should either have one already or make your own up. But, if you have some nicknames that your friends call you by, you should think along them lines.
What's the name of th town or city you're from?
what's your surname?
interests?
Think along those lines, if you can't think of anything, post up the answers to these questions, I'll try and help ya come up with some.
P.sI can't think of anything wrong with "non-stop". It's not brilliant, but I can't see a weakness in it (although i haven't thught too hard about it

).