Someone recently told me, at some length, that the secret to finding an ideal partner is to find someone who likes exactly the same things you do, all the time. The same music, the same lifestyle, the same social circles and habits, the same foods, the same clothes, the same everything that can possibly be the same.
In my experience, the same temperature is all that really matters. Plus, after the initial shock wore off, I think my favorite comments anyone's ever made on my music is how bad this band sucks or that singer's awful or the other one can't hold a tune to save their mothers' lives. (Other than actually loving it, I mean.)