I have had a cell phone since I turned 16. Of course, that phone was huge and mounted in my car, but it still counts. But, I've never really paid much attention to my phone. I routinely forget it at home. I don't send out 100 text messages a day. I rarely use half of my allotted minutes for a month.
I say all that to basically ask: What apps do you love? There are so many out there, I would love to hear which ones you think are worthwhile. Let me hear it in the comments!
(Meanwhile, HTC and Verizon have no clue who I am. They didn't pay me anything. I just really love my new phone.)