I'm terrible about using a mobile phone to call people. I think my phone has only been used to call a handful of places, and then only when I'm on the road.
I have a digital land line through my cable provider and like that just fine.
However, my mobile gets used to IM, email, and web surf constantly.
My husband makes a ton of phone calls on his mobile. You know, come to think of it, he makes 90% of the phone calls in our house which may be why I don't make calls that much. I just don't like talking on the phone. :)
-Andrea