For a long time, I had an obsession not with foreign languages but the families they were in. I also have an obsession with categorizing people based on benign things like college majors as well as controversial things like political party, social class, perceived mental illnesses, etc. and that has gotten me into a lot of trouble.
I don't put people into boxes because I'm shallow or judgmental, I do so because it makes it easier to remember them and just because categorizing and sorting, especially other people, just feels good, as creepy as that sounds. So, does anyone else have an obsession with putting things or people into categories?