Not all is relevant but I'll try to paint a picture..
He seems snobby and annoying when talking to people on the phone or when trying to get his way.
He is very intelligent, sort of a geek, reads books and such.
Wouldn't say athletic but is into sports.
Likes to dig deep in conversations.
Gives the impression of a serious guy or should I say, he takes himself seriously.
Was in the student body, likes to say "I was in love with my high school". As a friend later commented it's more like, in love with himself.
The sort of a guy who's fallen in love with his own reflection.
It's the kind of guy that takes the lead even appearing overly serious to the point of weirdness.
he's the kind of guy your mother would love.
Doesn't know where he crosses the boundaries with people but cares if someone takes offence.
Most of the time has a straight face, takes periods of relaxing and is content with not doing much, at least for a while.
Likes to playfully joke around when relaxed. When not, is rather annoying.
His music contains Arctic Monkeys, Stained Creed (God!) and he thinks Radiohead and Muse are very similar, which is ridiculous.
He's easily infatuated. Has these "romantic" stories of how he met his girlfriend at this party and fell in love immediately when he saw her and he then formed a relationship with her lasting for more than a year.
As for our interaction, I wasn't very impressed with him at first but I have to admit I couldn't ignore him. Currently has a girlfriend (cannot stay for one minute without one). when we talked on the phone he wasn't very nice but then when he saw me he suddenly flipped. I wanted our work relationship to be more official but he's a subtle geekish playboy who's mastered his techniques on how to get girls. Such as proclaiming he's "a man of relationships" (another one of those "brilliant" lines guys throw at girls, do they really think it works?) but he doesn't stay for too long with the same girl.
He likes to hear my opinions of people, carefully watches how I react to things, is very flirty, plays childish games, tries to find out information about me so he can use it later. He does so in a subtle way but I try to put clear boundaries (he has a girlfriend and I'm not into boosting up a guy's ego) and have our interaction more formal but he's really interested in playing games with me to see if he can get me to like him.
Hope it's not too much information but dissect away!