I haven't cut a book in two + years since I started reading again. My daughter on the other other hand told me to stop buying Supergirl.
Recently, some of my books are ending:
Superman Family Adventures (son's book)
Batman The Dark Knight (soon)
Superman Unchained (soon?)
Batman Li'l Gotham (daughter and son's book)
Hulk and the Agents of Smash (daughter's book)
The Wake (in a few months)
How I look at it is that any ending book allows me to try another one. Ending books have led to The Wake, Marvel Universe Avengers Assemble (for daughter), Black Widow, Velvet, Action Comics, Ms. Marvel. I think I have just put a $50 amount on my habit per month.
When Soule took over Swamp Thing, I was planning on dropping, but I gave it a couple issues and loved it. I think going forward, that would be my policy for all my pulls. Next up in question will be Flash. I can say that if I knew Detective was not changing writers, I would be on the verge of dropping that one.