Most of the people keep their names and surnames as the user name. If you wanna be really funny then you can keep your user name as User name itself. I guess this is funny and interesting too!
Gummi Bandit, Cupcake Killer, Cupcake Killah, Unicorn Deathmachine, Good is Dumb.... my advice is to pick a stupid word and smash it up next to something super awesome.
