Wow, you keep a pretty tight list! I'm under 10 monthly titles as well...
Its the economy for sure. I'm down to 5 titles a month myself. Walking Dead, Iron, Man, Astonishing X-Men, Cable, Batman & Robin, & I'm liking Haunt. But there's tons of stuff I want to try. I might wait & buy the trade paperbacks of other series I like.
Batman = win .
I'm up to my neck in back issues and I keep buying comics. My pull list is so huge and I'm completely broke. It's kind of depressing really.