Generally you cannot change your user name. Only an Admin can do that, and only then in special circumstances. By the way, your form name is just fine, there are no rules about what they need to be, except the obvious ones about vulgar words etc.
Support the true king, Support SavaTheAggie!
A proud member of the Legion of Aggie
I Pledge Allegiance to SavaTheAggie
and to the empire for which it rules
one Empire under One Admin
invincible, with tyranny and injustice for all.