The sky's the limit. On the internet in general and Newgrounds specifically. We have a valued member of o community who decided to call themselves "Piss".
By process of elimination, I'd say "Lumberstella" sounds the most like a username you'd want to keep for longer than a month. But I'd also say that "gaywhiteboy" doesn't sound bad either.
Scudlez
These "friends" that peer pressure you to name your username Gaywhiteboy are just shitty people, your username is weird and funny but make your username more authentic and unique. Don't let people tell you what to do. Until you think of a good username, then you can just rest and be happy.