I'm having trouble figuring out his motivations, and I can't determine how, why, or when he left his home.
Ehm does the Bugbear society contemplate the concept of "nobility" ???? ^^"
The only thing I can suggest is than you were another race and for some course/spell you ended up like bugbear XD
Well, in the campaign I'm in, bugbears are more refined, having been enlightened by a godly being.