...there's something very genuine and pure feeling there to me that seems specific to your type....and maybe it comes from that detachment... not sure....and don't even really know how to say it.
I know what you're saying here. Many people have told me this. I think Rebe touches on it pretty well here:
I agree with Lady X. An INTJ told me that he is completely clueless (naive) about human interaction and motivation.
For me personally (can't speak for all INTP's), this is part of it. But, it's much more of this:
I think that's the same way with INTPs. I sense that you guys are, of course, hard-core thinkers but there is also this pure, genuine quality. No complicated emotional bullshit, no messed up hidden agendas, you express what you want, you expect back exactly that.
Lady X mentioned that it might be the "detachment" that gives off the pure, genuine vibe. I think this is true, but indirectly. The best way I can explain it is that I'm so interested in whatever I'm analyzing or learning at a given moment (Ti), that I just don't care about all the hidden agendas, manipulation, emo games, and other side shows. I just don't have an interest in tending to those things. I know they go on, but frankly they disgust me and they're nowhere near as much fun or interesting as learning, researching, reading, analyzing, etc.
As an example, I had an ex who would get off work and want to tell me all of the "bad things" that people said to her all day and how they have bad attitudes, and they do this wrong and that wrong, and blah, blah, blah. I understand the importance of being there for someone you care about, but if I can be honest here, I just wasn't interested. If it's that bad, get a new job so that you (and we) can be happier. Fix the problem and let's move on to happier days. I'm not going to spend my time and my energy on things that are (a) senseless = they bare no fruit, (b) there's a solution to them but you don't want to apply the solution, you'd rather just wallow in your misery and bring me down with you. I don't have time for it. I want to keep life simple, uncomplicated, and pure. That stuff clouds my vision.
An ENFP that I knew also said that I was very genuine and didn't deal with complicated stuff. I think it was the Ti she was seeing. It's been said that Ti has a way of "trimming away all of the fat" of a given situation. We can look at a situation and immediately separate "what really matters" from "what doesn't matter at all". The stuff that doesn't matter at all - we don't want to hear about it or get caught up in it. Waste of time. We want to focus on what matters.
I remember a first date I went on once. We were talking and it was becoming obvious that the girl had been done wrong in the past and was putting up a strong, defensive front (maybe to test me, I'm not sure). At one point, she said something like, "Men are just jerks! They're all just complete jerks!" I just remember saying something like, "If that's the label you're going to place on me, then we might as well end this date right now. There's no point going forward. But, I've heard some really good things about you and I'd like to get to know you more so I can see those things. I have some things that I'm sure you'll enjoy about me too."
It's a way of disarming her (go ahead and put the gun down), hopefully putting her at ease (I'm
genuinely interested in knowing you), but also being blunt and saying, "This is a first date. Either cut the crap and let's enjoy each other's company, or let's get the check and I'll drive you home - no hard feelings."
Doubt one single person will be helpful. 
