I used to read a lot a lot
a lot. I woudl consume two books on a weekend and one or two during the week. Now unfortunately, I have this thing where when I start reading, if it's not during my lunch hour, I tend to fall asleep in a very short time. Still, I do love reading. I have a big pile of books from library sales. I'll buy 20 books and then get through five of them plus a couple of ebooks and a couple of rereading things I already own before the next sale.
Science fiction, not so much space opera but large-scale what-ifs seen through the eyes of interesting characters. Fantasy too; the bigger the sense of wonder and
history about it the better, though sometimes I just like a good clever rogue. But I really love a good crossover between them.
Science, especially cosmology (not cosmetology) and the very small, but occasional random things like materials science, meteorology, chaos theory, synchronization, symmetry. The history of civilization's technologies (more so than wars and migrations): books, time measurement, cooking.
Futurism, the possibilities of a post-scarcity economy, technology changing what it means to be human (and I like that in fiction as well). So often it gets less and less about likelyhood or plausability and more like reading someone else's daydream, which is fine too.
I don't read a lot of older books aside from Tolkien, but I do go back to Thoreau or Lewis Carroll at times.
Modern magic/witchcraft stuff occasionally.
More recently, books on metalsmithing and jewelry making, though mostly for inspiration and learning and reference than because they're particularly thrilling.

I've read a few books on gender, and most of them are either amusing or depressing or both. I have pretty much stopped.
Currently: re-reading
The Silmarillion for at least the fifth time;
The Hobbit movie pulled me back into the mythos. I'm also going very gradually through T. Thorn Coyle's <i>Evolutionary Witchcraft</i> and need to read that book about jewelry soldering that I got for Christmas.