I used to read a lot more before we had children (over 100 books one year). Now it's about two per month - looking forward to retirement and being able to sit and read for longer stretches. A lot of music bios, a lot of fiction, some other stuff as well.
Favorites? There are a lot - Stephen King, Douglas Adams, Christopher Moore (who's just fantastic) are probably the top of the list. Grady Hendrix is a new fave - I've read "We Sold Our Souls" (about a rock band who did) and "My Best Friend's Exorcism" (the title is a total giveaway). Just picked up his "The Final Girl Support Group" about a, well, support group for the final survivor from horror movie-like scenarios. Looking forward to it.
Stephen King has been very good about recommending books online. Two that he suggested and I read are "Road Of Bones" by Christopher Golden and "Chasing The Boogeyman" by Richard Chizmar. The Chizmar is excellent - it's written in a modern true crime style, and even though it says "novel" right on it, I still looked it up online because he made everything so believable.
Science-wise, the most recent was Katie Mack's "The End Of Everything (Astrophysically Speaking)", about the different scenarios for how the universe will end. Very readable, and great explanations.