Mine is a distressing amount of theory, graphic novels that are problematic, and piles of anthropology texts I never actually finished mixed in with a really mixed bag of sci fi and fantasy novels. "Post your bookshelf" would be fun but also maybe not fun.
People here would look at my bookshelf and first go “mhmm mhmm yeah good theory and history books”, and then start making fun of me for the sheer volume of Stephen King novels I have. And the Star Wars novels I read in middle school that I kept.
I'd get roasted on here for a variety of reasons, but most of all because I have a whole bunch of Econ textbooks from my university days. Also the entire top layer of my bookshelf is just Qu'rans with annotations.