Based on every conceivable variable, which cell phone service provider should afford the most satisfaction?

I'm thinking of switching to a new service provider as I'm unhappy with my own. I'm looking for suggestions to whom I should switch.

Based on every conceivable variable, which cell phone service provider should afford the most satisfaction?
If you have a family T-mobile has he best plans but not great service. Cingular has rollover but its kind of expensive. Verizon is kind of expensive too but you can call other verizon members free