Well, I think my bro is Ne-INTj, and he's very probing, less concerned with systems or certainty. He has this way of not expressing an opinion when you know he's got one. Slowly, bit by bit he'll ask innocuous questions to probe you and get a feel for what you think, with every passing second honing in on the heart of it without imposing what he thinks at all. It's a purely vicarious experience for him. Often, he won't directly express what it is he's thinking at all. Possibilities weigh heavy for him, far more than what might seem reasonable given the circumstances; a mental explorer. He likes to play within sets of rules to see what happens without regards sometimes for what might be most effective. He doesn't set goals per se, but tries to enjoy things which for him means being able to vault about without people naysaying him. He's incredibly generous, to the point that you want to give him the same. Nicer than you can imagine, and hands off. He lets you do your thing. He may ask questions, but he doesn't push. Curiousity abounds with him. In the absence of straight forward emotional communication he hurts, and he has an open way of expressing it that forces you to feel it yourself. He desires an easy, open, positive environment that allows him to delve into his interests. Laughs easily, without concern for appearances. Even at odd moments he won't hold back. He puts other people first. When things aren't what he expects, he sulks to the point that you can tell he wants someone to shine for him and that would be all he needs. He's funny. He's brilliant. He's my twin and the single most admirable individual I know.