I have one because I need one, It's mostly turned off, I turn it on when I'm gonna call or know someone is gonna call me.
But I just don't like talking on phone.
No, I don't use or want one. (Call me a conspiracy nut but I've always hated the feeling I get when I'm close to one). Perhaps I don't trust them... I don't know.
Both of my parents use them on a regular basis, but I refuse to buy one. (Not that I'd need one anyway..)
I do have a cell phone, but only because my mom made me get one because my school's 7 kilometers away and I go on bike... But I don't really use it, unless I get a flat tire or something.