I think it would be very hard for me to deal with strong F-types. I'm so much in the fog that is the grey-zone when it comes to morals and values that I'm pretty sure I would be eaten alive. I might be able to handle if it their deep values weren't the ones that I tend to find exclusions for: "Just bomb india and china, we may lose some great minds, but that's the price to pay for food."
Where I would be slapped by a lot of Fs I know, an NT would more likely critique the plan: "What kind of bombs? Wouldn't collateral damage, both physical and political, far outweigh the benefits?"
In the end, I think, some amount of levelheadedness is required in anyone I would consider relating to. But then I wouldn't want a data-brain (Or if you've read Dune, a Mentat) as a significant other, either. I want someone who can help me deal with my faults, or at least, help me get out of some melancholic moods, and vice versa. Sort of like one legged men who rely on each other for support, neither one daring to leave the other or both will helplessly collapse.
Really, deep relationships are as, if not more, complex than people because one has to compensate for the other and vice versa.