What you think of them?
I generally like them, especially the 8w9 ones. They can be a bit strange, and when I've debated with them some of their views can seem antisocial and alien to me. And it's really strange to debate with them because of that, lol. We just seem to have really different priorities. We seem to eventually meet at Ni and Se, but the Fi and Te different is really large.
One of my high school friends was an ENTJ, he was a really nice guy, even though his bluntness scared off some people (he really didn't like it when that happened, but he couldn't seem to help it. 16-18 year old Te dominance). It was fun to go out and do stuff with him. I liked how he always had something to say, I really liked talking to him about stuff; just anything really. I met him in chemistry class, and my teacher was using the MBTI test to group people together. I got INFP, and me, him, and an ENFP guy were the only other people that scored as N so we were put together. I think that our different skills worked well together in the class, and we started talking after working together for a bit.
Do you feel that type is shrouded in mystery?
Kind of. I think that both ISFP and ENTJ are shrouded in mystery in their own way, like every type.
What strikes as the oddest thing in them?
From asking them questions, one of the oddest things about them is that they seem to have a really hard time with physical intimacy and intimacy in general. And like KDude said, that they actually do mean well (I hope so anyway).
Can you begin to understand what their life is about?
Well, not really. lol
What kind of societies or groups these people participate in?
No idea. Education based societies? Like college alumni etc. Lots of ENTJs seem to be obsessed with learning and accomplishing stuff in school.
Do you see those types a lot?
No not really. They are, afterall, one of the rarest types.
How do you act around them?
Depends on the individual. I just usually act like myself and see what happens with anyone.
What would you think they think of you?
HAHAHA, they'd probably think that I was weird and lazy in my personal life (but I get shit done at work); and that I am too apathetic about things. That I look at things too simply, maybe.