I also love to read, have always loved to read.
When my children were little, it did not matter what was going on, what my mood, I could always sit down and read them a story. It got us through many tough times. I love children's books.
Now I use reading as an escape. No matter how busy, I always allow time for an hour or more of reading after work or after dinner. The thing I look for in fiction is character development. I guess I like to read about what I don't understand and do not have in my family. Things I cannot stand are fantasy, romance, science fiction. I like a book to be firmly rooted in the real world. I have a hard enough time understanding what is real without venturing into the imagination too far.
I go through nonfiction periods. Like others, I have read everything about Asperger's and autism, usually in the form of biographies/autobiographies. My favorite all-time nonfiction was "Dibs, In Search of Self". I am particularly captivated by elective mutism, strangely enough. I wished I had thought to stop speaking as a child to draw some attention to the fact that I WAS NOT ALL RIGHT!