INFP: they are not controlling, better at nurturing a child (female), aren't that obsessed about outings, fairly loyal, keep things harmonious, etc.
This is all assuming it is a healthy INFP, if it was an unhealthy one I would take the INTJ or INTP over them any day.
INTJ: they would make up for my lack of organisation and decisiveness, good for intellectual stimulation, not needy, loyal, etc.
INTP: a healthy, well adapted INTP lady would be the absolute best, for reasons I cannot be bothered saying.
Least favorite type would probably be an ESTJ, ESFJ, or ESFP.
I just can't imagine myself ever having a deep connection with a sensor... I need somebody who can grasp the ideas going round in my head. ENTJ might be a handful to cope with. I could 'work with' all the others I think.
I'd say I'm more inclined towards NP's.. But this is in general, so I'd hate to draw premature conclusions in regards to romantic relationships.
Most the dude's I've seen have been Sensors, I wish I got to meet more Intuitive s.
My partner's an INTP. It works, somehow. I don't think I'd really care what type as long as we have some way of connecting. I don't think relationships are often successful when they're some all-consuming void anyway.
If you can spend time together and enjoy one another's company, you're doing fine. Good conversation is the ultimate barometer of whether or not someone's a good partner. Doesn't mean you should be in a relationship, but I don't see many successful relationships without it.
I don't think most of the traits I 'need' in a partner are type-specific anyway, I could be happy with a variety of people.