Hm yeah I only have one SEE friend from uni, and then my sister is SEE (e7). I get on well with my sister, and I suppose maybe because she's my sister it's easier to look past things that might be annoying otherwise with other SEEs. I also think I might get on better with SEE e8s but haven't come across many.
With IEE and SEI- I think they can both find it hard to recognise when they are at fault in a situation of conflict, or that they might have played a part in the conflict manifesting. Whereas SEE and IEI seem to understand that a disagreement between people is something that can be analysed and explained, by thinking about the attitudes and feelings of both people involved. Maybe this is a se/ni + ethics thing, I don't know. However, an IEE or SEI might have something to say about SEEs and IEIs approach to dealing with conflict.
I think my sister and I both do like to get things off our chests, and we will voice some strong opinions, (me more than her?) before we come to the conclusion that the other person didn't mean to upset us..It might take us both a while but we seem to get there in the end. Also, I think my SEE sister will try to wind people up who she is annoyed with, where as I will just call them all the names under the sun behind their back haha. (if they are that bad
)