They drive me nuts.
I realized this in depth on my gap year program, I knew this before from playing with my family, and I have learned that even when round a table full of some of my best friends (incidentally, but not purposefully all xNxx types) I can't hack it.
I just wish people would be more on top of the game and not hold it back. In effect, be more efficient players. And yes, I realize the paradox that the whole point is to enjoy your time with others.
I just can't hack it. I confessed this hatred to my eNFJ friend the other night when reflecting on our latest game of Settlers (with an INTP, INFP, ENFP) and she pretended to sympathize with me while really giggling on the inside.