I actually answered this question on a different thread not long ago, so I'm going to be a cheater and just copy the same post. 
To read, it would definitely have to be fantasy (only once in a blood moon do I ever read anything that's not, and the things I do read outside of that would probably fall into the mystery/crime genre.)
I also write exclusively in Fantasy. But "Fantasy" is such a huge hard-to-define genre, that can pretty much mean a tiny unbelievable element all the way to LOTR and Dungeons and Dragons. And because Fantasy is such a huge and varied genre, I'll get a bit more specific and tell you the themes I always seem to end up writing into my works (and the themes I love to read!):
Pantheons (I don't know why, but I love writing stories that include multiple gods, and it's a theme in pretty much all my works. I really enjoy exploring the interesting tangle of emotions and meanings with divinity (Which is also why a lot of my works contain divine horror and trials of faith) If we are made in the image of the gods, then what does that say about the divine?)
Identity (What makes a person a person? It's a big question, and one I find myself often weaving into the narrative as the MC meets creatures and people from different backgrounds and/or species. At what point do we draw the line between monster and man?)
Family (I love reading stories where the main cast becomes a family unit, something that can never really be separated, a family of choice not blood. Perhaps because it mirrors my own real-life experiences with family,(with blood-family taking you for granted and found-family actually appreciating you) I always incorporate elements of the MC choosing who is theirs and vice versa. The Blood of the convenient is thicker than the water of the womb)
There are a few more tropes I use a lot, like there always being a child main character or LGBTQ+ themes, but I'll stop here before I ramble on forever.