I read in nearly every genre. My only sibling is 6 1/2 years younger than me, and I was homeschooled until I was in 7th grade, so I spent a lot of time reading everything I could find. Back then, it was Nancy Drew and historical books, like the Dear America and Little House series. My parents were pretty strict about making sure the books I read were "clean", but they also had to trust my judgment because there was no way they could keep up with my reading. (Trust me; they tried.)
As a teenager, I started reading fantasy almost exclusively. I had read Narnia when I was young, and loved it, but it didn't make me want to seek out other books in the genre. Then I read Ella Enchanted, and all of Gail Carson Levine's other books. I realized there were other authors who had rewritten fairy tales, and I looked all of the ones I could find up on the internet and checked them out at the library. For a few years there, I read various versions of Cinderella, Beauty and the Beast, Sleeping Beauty, and more. I read epic fantasy, and urban fantasy, and everything in between.
Now I still read fantasy, but I intersperse it with historical romance (never contemporary- too far from how I know relationships to work), the occasional contemporary YA (usually John Green or Maureen Johnson), and science fiction. It's all about escapism, and my current mood. I switch between books based on how I'm feeling. If I feel like I'm on the edge of depression, I can't read something full of war and intrigue and hatred. I've got Robin Hobb on standby, but I'm not emotionally ready to deal with that right now, so I'm reading the Percy Jackson books, and the Immortals by Tamora Pierce.