it's like the c-walk...... two years ago it was the coolest possible thing you could do, but then everyone learned how to do it and no one cares about it now....
I say, find a dance move that looks good AND is undiscovered (easier said than done)..... look up break-dancing websites, you'd be surprised how many great moves there are out there (that are tough as hell to do tho)
a good way to practice is to set up a video camera and do it in front of it, then watch yourself - this way you can see what you're doing, how it looks, and easily point out ways to help/improve..... make sure you burn the tape afterwards tho