Gnome Wannabee
I think the idea is too vanilla. Too "Charlie Brown."
Spice it up with some risk. Like he's always wanted to be a half-orc barbarian ... thug. Because he's felt ineffectual as an academic. I mean people feel like they want to be more jock-ish. (Don't we? LOL)
How about he's always wanted to be that James Bond/Conan/Lt. Warf type ... so he's constantly searching for an image that isn't him. He shifts from half-orc, to human, to ogre ... always looking for the BEST PERSONA (almost Pinocchio-Complex) ...
And in doing so steals stuff from other people as an indentifying marker of "their culture."
... and he wastes his life away trying to be something he's not. Always discovering that the one thing other people have ... are other problems ...