I'll do like TheChosenOne did.
1.) When I met him I thought he was rather talkative but getting to know him I found he was quiet very often when we're alone (and this doesn't seem to bother him). E
2.) He studies computer science and meteorology as a minor. He can talk about computers for hours, and enjoys programming (more than math courses I guess). This seems to be a general interest/hobby to NTs
3.) When he's interested in something he likes to get to know every little thing about it. This is very often also the case concerning decision making- before making a decision he has to inform himself very thoroughly (e.g. before buying any technical thing he likes to find out about its functions and compares different models). P, this pretty much exemplifies P
4.) He plays a lot of comptuer games (i only know about WOW, worms (?)) and role playing games (?) (DND). N/A
5.) He likes discussions, but does not argue all of the time. In arguing he sticks to his point of view and tries to convince the other person, and is annoyed when I take the opposite opinion just out of fun. Sounds like Ti
6.) Sometimes he talks very quickly, like there are too many thought and too little words . E, specifically Ne
7.) He can be very lazy concerning studying. He only does what he really likes and cannot be talked into doing something he doesn't like (and sometimes seems to live according to "play first, work later"). P
8.) He often seems very absent-minded and inattentive when listening to you, and I often feel like he is not interested in what I'm saying (not always, of course). he often seeks little eye-contact, but I don't feel like he is shy in that respect, he just shows you when he is not interested, very much by body language. Sounds Ne, Ne people always have some random thought going through their head at any given moment.
9.) he is interested in politics and history, reads a lot online, but when fiction mostly science fiction. N/A
10.) He does not have a really wide circle of friends, but mostly long friendships. he mostly meets friends in a group. This just sounds ENTP, since they don't seem to need a lot of friends.
11.) When in a group of friends, he is very very dominant in that he wants to say his opinion no matter what comes, and suddenly speaks very loudly (in contrast to the rest of the time). He speaks up when he feels he or someone else is treated in an unfair way. Extrovert and Ti... god this guy just sounds so ENTP
12.) He is very independent, and needs to spend a lot of time on his own. ENTPs are very much independent.
13.) he does not always use the most precise word when describing something, but always gives detailed descriptions. Not sure
14.) He started playing the drums and is interested in the structure of music he likes. Sounds NT
15.) He is rather shy and quiet when meeting new people. Implies introversion but eh.
16.) He stays calm in every imaginable situation, and he rarely displays emotions; though he smiles rather often, he would never show emotions such as anger, sadness, intense joy etc. He can be ethusiastic, but rather rarely, and often does not show real authentic joy when given a present (even though when he says he really likes it). T
17.) He had his first girlfriend when he was 25. N/A
18.) On the one hand he enjoys slapstick humour, but on the other side he enjoys humour I would call a bit sarcastic, as in the series DARIA (dont know if its a good example). Eh not sure
19.) He can be very funny, and this humour mostly engages some kind of word play (like puns of the double-meaning of words or something like this). Ne
20.) Even though he helps his close friends in a lot of ways, he can be very mischievous and is often unempathetic. Fe>Fi within him
21.) He always notices things around him connected to funny language use (like funny spelling mistakes on signs etc). Ne
22.) His room is very, very, very messy with all kind of technical things lying around. He does not pay any attention to aesthetics concerning his way of living. He does not pay a lot of attention to his clothes (though very aware of what they tell about him). He says he wouldn't just wear everything, but on the other hand he never buys new clothes until the ones he's wearing are falling apart. E__P
23.) He'd rather like to run his own business instead of having a 9 to 5-job. Independence = ENTP, flexible work = P
24.) When you start accusing him of anything, he gets really quiet and says nothing at all. Not clear on this... accusing him of what sort of thing?
25.) He does not want to please everyone (he sticks to his opinion in situations when I do not, e.g.). Just screams ENTP
26.) He really rarely asks questions about how you feel but rather about what you think, and isn't interested in talking about personal stuff (especially concerning himself). Lack of Fi
27.) He is interested in society and often talks and thinks about what is unjust and how it could be changed, and is often worried about the future of the world. I want to say N but eh idk.