ILE brother Almost competitive relation - he can compete his brother for attention, at least for a while. [Not socionics. This seems like normal brother thing? Depends on influence from parents as well.]
They get along very well. [Socionics. Favours duality.]
[Later thought: is it rivalry or just play? I know I can play fight with my ILE friend at school.]
ESE boss Seems very warm from outside, and they both talk a lot when meeting, the ESE touching his arm or shoulders, and both laughing and smiling. [Normal ESE behaviour? I know they treat me like this. Does your guy touch back?]
However, the ESE seems to get irritated with him for not being "polite enough", saying things like "he should pay more attention to creating a good atmosphere in meetings", while my friend ignores the advices of his boss as being "ridiculous" and "wrong". [Half and half. Could be pride. I know when my ESE friend gives me those lectures, I really just want to roll my eyes and tell him 'lolno'. Also, SEIs are fully capable of tuning and just smiling pleasantly at people while secretly drifting away to their home planet

]
w/me He can suddenly become very sharp and direct, but will apologize almost instantly. I like him a lot. I am not sure he knows, as he seems very hard on himself, thinking he's done things wrong all the time.
I'd call him moody. This might not be type related, though. [*sniffs* I smell an IP.]
He's very intelligent. [Not socionics]
SLE friends Seem to have a lot of fun with my SLE friends, but I've seen him being "corrected" by SLEs for being "lazy" or "bitchy" at times. [I'm actually leaning towards SLI now after this. This sounds like a Beta/Delta misalignment, possibly?]
And then he has no problems going into direct verbal battles with SLEs and tell them they are "inconsiderate" or "one-dimentional", not seing the full picture. Others tiptoe around him and the SLEs when they have such arguments, as they can seem very heated. [SLIs can be very combative. *thinks back to trying to introduce his SLI friend to Socioncs*. Oh, and I have the threads to prove it in case you doubt me

]
w/LIE Has a LIE childhood friend. [This will influence the Socionics, obviously.]
The LIE seems to find his friend a bit inconsistant/incontrollable, and often laughs at his ways. [This sounds like EJ-IP clashing.]
I don't think they would have been friends had they not known eachother from birth almost, - their values are very different. [I'm tempted to toy with Merry/Serious on this... another point to SEI > SLI.]
The LIE seems to trust his friend with emotional problems. I've often seen the LIE talk and talk and talk about personal (relational) trouble, and my friend listens and gives advices. [Supervisor's HA feeding Supervisee's DS?

Also note, Alpha SFs are pretty good relationship counselors! From experience, though, I find the way my dad deals with Fi really, really confusing. But then again, we're not childhood friends

]
Actually my friend has this "listen and give advice" role with many people. [Sounds normal for Alpha SF. This was one of the reasons I thought I was IEE for a while.]
w/ESI The wife of the LIE. She is very silent around him, just observing. I think he doesn't like her much. He seems nervous around her. [This one is interesting, though. I'm not sure how to analyze this at all. Could you give more information?]
w/IEE colleague They seem to joke a lot and I'd say my friend tries very hard to connect with the IEE, while the IEE seem to want to have a more "fun yet formal" relationship. [The "Wanting to connect" throws SEI off a bit, maybe. I know it makes me slightly sad that people as awesome as IEEs aren't on-demand though

]
It looks a bit weird from outside, as if they bounce off eachother after an initial phase of jokes. [I can relate to this. Typically with IEEs, I find we really can't talk outside of Ne/Si stuff at all.]
EII colleague My friend defended the EII, stating that the EII just wanted to make things more comfortable for everybody else. I've seen him defend the same EII in front of SLE friends more times. [Typical Si firefighting. If he's interested in psychology, or knows the EII well, this explains why he'd understand her point of view across Alpha/Delta. Without that, SLI.]