The only thing I know for sure is that he's NOT XXFx.
He works with missiles for the government. Reads SciFi as well as published scientific journals in search of new or approved upon theories that he's interested in at the time, like string theory.
He likes to watch chaos. For instance it doesn't snow much where I live and if there is even a small threat that it will, people freak and rush to the groccery stores. Well, he likes to go to the groccery store so that he can soak up all of that chaos.
He usually stays emotionally calm, but if provoked long enough he'll explode in anger.
He has no problems making friends and connections. He has some of the same friends from 30 years ago, but has an equal amount of new friends.
When he was younger he used to go out and party almost every day, but now that he's in his 50's he only parties once or twice a month.
He wants things done correctly the first time around and has no patience for incompetance or stupidity. He's never late.
He's practical and will only buy or accept gifts that can have some sort of usefull function in his life.
He doesn't understand other people's emotions.
That's about all I can think of, here are some pictures, if that helps