Honestly, I'm carrier agnostic. I'm more concerned with the technology.
That said, VZN's customer service has always been spot on. at&t absolute sucks in every way imaginable. If I had the ability to get rid of them in every capacity, i would in a heartbeat, but unfortunately, where I live, there aren't many options for landlines and such...yet.
Only think I don't understand about VZN is why I cannot use data while on a phone call. I thought that was the whole premise behind 3G.