I get along well with most ENTPs. The main difference is that they are more wacky and 'out there' compared to myself. I'm more quiet and subdued. They are more into debating things than I am. They see it as something to do for fun whereas I don't do it for its own sake, rather its to clarify some idea because I seek logical consistency. I think for ENTPs the ideas are like an end in themselves and not quite as concerned about logical consistency or having it all fit together but being Ti users they still value it.
Another difference is they seem to be more impulsive and less cautious.
Same here.
I find it interesting that several people on this thread have noted that their introvert/extravert counterpart is great chemistry as a friend but not so great chemistry as a lover.
Same here on all counts.
I come from a background totally devoid of NTP's. (almost all TJ, and mostly of the S variety). So I was the lone weirdo, basically. The person I know who knows type and identifies as ENTP is Jenocyde, and she is so interesting. (I've really been missing her after our last meetup, and now it will probably be more difficult with her having a baby).
The "light and airiness" shared in common with fellow Ne dom. ENFP, but with a more "tough-minded" logical streak. And it's Ti, so is compatible with my main perspective, and not as cold and directive as the all too familiar Te.
Like a more expressive version of me, able to swing back and forth between silliness and seriousness. And doesn't think I'm weird, or even rude if I cut in and go off on a tangent. (She was like, "that's fine, let's go with that thought", and I recognized that must be the dom. Ne difference).
Being extraverted, and with Fe a tad higher, they also seem better with people, and will stick up for you strongly against others.
However, having a relationship with one, the way I see it, as another NT, which I identify as "Choleric in Control":
http://www.pastoral-counseling-center.org/Temperament-Area-of-Control/choleric-control.htm That I recognize as the tough side of my own [otherwise opposite] personality that won't back down in a conflict, and fights to the finish, often with an endless battle of "oneupmanship". It's difficult enough with an ESFJ, which is Sanguine with Melancholy in Control. So they are expressive, and also structure-focused like the NT (which leads to being more guarded as to personal boundaries), yet with the Fe/cooperativeness, they will at least eventually back down, and won't go as far to step on your toes, get you back, etc. An ENTP (Sanguine-Choleric) I imagine, will be just as explosive, but not back down. And, likely not be as empathetic either. And with their expressiveness, they will have an edge over me. So I would be leary about it.
I imagine that having the same "intelligence variant" (last three letters, same functions), there would be less of a tendency to clash in the first place, than with the S/N and especially J/P conflicts. But in any relationship, there will be conflicts eventually, and I don't know if it could last as sensitive as I am. (Would even have to worry about getting locked into endless wars with a fellow INTP).