I just thought of me and my roomie when it comes to communication styles. We are very different personality wise and she has told me (in love) that I am about the worst person to brainstorm with. See when you share a potentially good idea with me, my brain goes into make it work mode and I'll say something like, " Yeah, that's a good idea. You just need to shore up weak points A, B, and C and then it will work great. Worth a try at least" And she feels like I've just shot her idea down; and I'm like "no, I thought it was a good idea, I said it was worth trying." So yeah, that's how these things go I guess.
And now just for fun: an excerpt from the idiots' guide to INTJ's (of which I am one):
Q: I have this REALLY good idea… should I tell an INTJ?
A: Sleep on it… for a week or so. If it’s still so appealing, sleep on it for another week. Then maybe run it by one of us and we’ll pick it apart for you. Your idea is more likely to survive our scrutiny relatively unscathed if you have actual logical arguments and sound evidence with which to back it up.