Life changes. I added a second line and a second Droid so that I could talk to my sons in Ohio. I bought insurance for both devices and Lookout for both devices.
Then I got a new job which requires me to travel a lot. I upped the data usage to account for the GPS navigator, portable internet hotspot (which is how I'm making this post from my PC), Netflix, and similar.
I make my bill in a day, so it's well worth it.