VERIZON WIRELESS or AT&T- which is better?

I'm buying an iPhone.
I've had VZW for the past 6ish years. But AT&T is slightly cheaper.
so, AT&T people.tell me how you feel!
should i switch and leave VZW behind?
or tell me why the extra money at VZW is worth it!

Added (1). Tell me everything: the good, the bad, and the ugly!

Verizon's coverage is better from what I've seen and you get fewer dropped calls.