why dont people get the idea that the poster makes the ID memorable, not the other way around. Post like an eejit, go off on rants or whatever and you will be tarred for your e-life, which will not change if you change your ID. In fact, it will probably make it worse because then you look weak.
Besides that, the mods agreed in the summer not to change any more usernames unless there is a VERY good reason. If you don't like your username, ask us to ban you, re-register and take your chances in the newbie like everyone else.