I like my fiction to be speculative and/or experimental, and for non-fiction I favour fairly-focused micro-histories, travel/cultural experience write-ups, things that go in-depth on a single or limited subject (often of moderate obscurity), and books which explain how stuff works (especially in relation to other stuff), and I also like specialist hobby/crafts books which I will never actually try the instructions for. And I also like a good use of visual design, hence my increasing collection of deluxe editions of various sequential art forms and artbooks concerning.
The result is that I end up reading a lot of sf/fantasy, historical and/or international detective mystery and adventure/drama (not much for thrillers, unfortunately, since they're much more readily available), experimental literary fiction which probably pays more attention to style than substance, graphic novels, travelogues and “growing up in X time and place” immigrant and expat memoirs, and “the art of” and/or “the science of” volumes.
And I tend to indiscriminately acquire the kinds of books that ornithologists write about
identifying the local birds in your area by the splatters they leave on your car windshield, comic books which include strips about that time that there was an
international incident about a disputed pig which led to a brief border war, and things like
DIY historical re-enactment costuming for the kiddies you are taking to the Renaissance Faire with you and/or
cooking and serving feasts in the style of the ancient Romans so that you finally have a use for those reclining couches you built in your garage.