If you want to include group dynamics, I'd be more than interested. As you see I'm a IXTJ (I believe I lean more toward the S, still not sure though)
But my close friends are ENTP, INfP, eSFJ. (I'll be using their type as their title)
The INfP, completely goes with the flow, never asks for anything, doesn't direct or take charge on any situation. He'll never say anything insulting; he will never defend or debate anything. Simple put he goes with the flow.
ENTP is quite domineering, lazy, smart, and physically strong, wants his way, doesn't like to be told to do anything. Very confrontational, we could agree with each other on 98% of an issue, yet we will still argue over it (and I rarely back down). Fun loving, outgoing, emotional tack of an IRS agent collecting bills (don't give me a sob story, give me your dam money).
With his goofy behavior, he is able to make INfP a hard extrovert (and just as goofy), threatens anyone who interferes (not as violent as it may sound). The eSFJ is the end of many jokes from ENTP. If you are easily offending, heíll make sure that you end up being so. Butts heads with everyone except INfP.
eSFJ is the only one who openly cares for anyone (also has had the most girlfriends). He doesn't like conflict, will avoid it if he can, though he will defend issues if they are important to him, or if he has backing from me, ENTP, or girlfriend. He can make INfP an extrovert but not on the same level as ENTP. eSFJ learned how to go with the flow.
Anyways, I want to see if there are any common occurrences, and how you function within your group.