Truth be told, these days I find less and less use for my cell. When I'm bringing the dog out for a walk or going shopping, I leave it at home. When I'm driving and it happens to be in the car, I let it ring out. When I sleep I leave the phone in another room. Every service has an answering machine anyway, I'll get back to you. The majority of my communication is done online through a laptop or desktop where I don't get charged real money per email. Yes some people have data plans, good for them, but even then I'd rather not peck at a miniature keyboardless monitor when I can do the same thing much more easily on an actual keyboard.
If I ever become a doctor or take on some other role where people are paying hard cash for my 24 hour attention, or possibly if I had a very sick relative, sure I'll change my habits. Until such time there really isn't much that has a right to interfere with my life whenever it wants to.