A couple things:
There's a theory that two people with the same primary function but reverse I/E (example: Ni + Ne) will experience multiple orgasms, so that's where the ENxP plus INxJ stuff comes from.
In my expansive personal experience (one INFJ: my mother), INFJs are
very passive aggressive. but it's not in the annoying "oh, please feel guilty to prove that you love me, because I'm lame" way... more of a "I'm super sensitive and you've wounded me, but I won't confront it because you might hurt me even more instead of apologizing, so I'll ignore you instead and hope you get the message, but if you don't, I won't tell you for at least another 24 hrs. 'cause I'm lame like that" sort of way.
INFJs are psychic.
Misunderstandings are a major issue with these types as they share 0 common functions (all the Is and Es are reversed). I've been called cold, heartless, cruel, etc. by my mum

. With MBTI awareness, however, all this can be ameliorated.
INFJs are definitely dating potential. There's a lot for each to admire about the other, and from where I'm standing, the INFJ has TONS to offer the ENFP. My INFJ is my one person "inner circle" without whom I would be a directionless restless depressed neurotic panda.
I've read a notable number of responses on this site that say INFJs are insane. I haven't experienced that. No, wait... AvereX is probably insane because he liked my sick humor. Still, relative to me, they're not insane.
In conclusion: INFJs, I love you. I'm not sure what we have to offer you, but you are the best friends/loves an ENFP could ask for.