Re: Gamertag Ideas
Why not try Dr Doom?
Or maybe go for something completely different. I know if I can't use Arseface as a handle somewhere, I'll use Topaxi.
If you're still set on that though, I can think of Doctor Doom, Doom Dr/Doctor, The Doctor of Doom, etc. Just mess it around a bit till you find something that works and is comfortable with yourself.
As a side note: WELCOME!