[Race would take offense to being thought of as an old dude if he hasn't had his whole life to get used to it. Having white hair when you're sixteen is great when you're trying to lie about your age to get into the military - not so much when you're 35 and people think you just look really good for a 50 year old.]

A few, but if I knew what it is we have in common, I'd be able to narrow it down.

[He plants his hands on his hips as he thinks, and is displeased but entirely unsurprising to find he's missing both his side-arm and his switchblade.]

Don't suppose you're the kid of a high-profile government scientist? Maybe a foreign dignitary?