[shameless]

Well I see most pairings of ISTP/INTP as unlikely in romantic relationships, as I do think the big barrier would be the whole concrete vs theory. But depending on age, maturity, emotional intelligence of the two I can see it being possible if its an ISTP that can also like to tap into their theory side more then standard, and an INTP that can be more grounded/practical so to say, then the 'norm'.

When I mistook myself as an INTP originally and was in that section I realized there was a basic stereotyping going on both directions. A few more extreme ones (not the older mature users) did imply I was a 'dense' sensor as I was equally always trying to reign back in conversations that I thought took just ridiculous asinine turns. And I basically just started to have the basic consensus of WHY? to most of the stuff they were mulling over. Not all, some conversations were pretty neat. I liked a lot of their thread topics and such. But sometimes it felt more like a room full of stoners just as much as intuitives seem to imply that being in a room full of a sensors is dull/dense. So I would just imagine the relationship would struggle on a medium unless it was mature people and a common middle ground could be met. I like some theory and abstract enough that I mistyped as an INTP but my lil sample was boggling. I again just didn't get the reason or purpose or motivating factor in half the things that occupied their mind. "Ok well while you think of how to put the fire out with a magic time machine in space continuum, I am going to go get a pail of water and physically put it out"

Aside from that I think the relationship would heavily struggle with both the shared I/P omg, unless one of their ennegrams was more dutiful or outgoing it would be like the blind leading the deaf as far as complimenting each other and bringing out each others best.

I bet the Ti/Ti with perceiving and Fe would attract and could maybe in a mature situation make up for the other differences. Both INTP/ISTP are pretty objective and would probably like that in each other.

I am guessing that ISTP may have to refine themselves a bit and polish their wording to be taken serious. And an INTP would have to be able to be down to earth and not come off pretentious or callous. ISTP can come off like unpolished/unrefined, uncivilized, (I think a lot of intuitives think of a meathead stereotype, un articulate based on choices in expression (that not mincing words bluntness) enraged lunatics. While INTPs can come off like awkward intellectual elitists at times.