I have been a Netflix subscriber since February 2006. It is the only service that I have subscribed to for that long, and the only one I never, ever ponder unsubscribing to.
I've subscribed for as long, and Netflix occupies the same place in my lifestyle. It's a testament to just how great the core service is that they could make some very bad decisions, such as removing the entire social subsystem of friends, lists, and notes, yet not once did the thought of canceling cross my mind.