Don't forget enneagrams. These things are all based on very shaky research at best. I would argue that love languages of all of these are probably the best supp

Don't forget enneagrams. These things are all based on very shaky research at best. I would argue that love languages of all of these are probably the best supported, or at least the most plausible a priori. After all they mostly boil down to, "I especially like {touch, gifts, service, ...}." But even then I think that for most people you need a mix of all of these things in a romantic relationship. Getting great gifts from a spouse is not going to save the relationship if they won't touch you, nine times out of ten.