Have your book-tastes changed over the years? More fiction? Less? Books that are darker and more serious? Lighter and more frivolous? Challenging? Easy? How-to books over novels? Mysteries over Romance?
Like most people, I go through phases, but let me try to think of some generalities.
When I was younger, living with my parents, I read a lot more fantasy than I do now. That's because my dad is a huge fantasy reader so I had easy access to both his books and his recommendations.
I read more nonfiction now than I have in the past (not including assigned readings in college and grad school). Part of that is because I live with a nonfiction reader and get must-read recommendations from him and part of that is because I make more of an effort to read nonfiction for pleasure (like making sure that every other "book of the month" is nonfiction).
At the end of the month I'll post a list of all the books I've read so far this calendar year (if you are dying to know sooner rather than later, you can see the list on my bookcrossing profile page). But in general it seems that I naturally try to balance more serious and literary reads with lighter (dare I say "fluffy") reads.