Keep a phone for entire 2 year contract--- Is it possible?

I've been upgrading every year. Verizon taking away 1 year upgrades hasn't deterred me in the least. Being that I have three phones on my contract, and that I'm the primary account holder, I switch upgrades around as needed. I can upgrade every year or more should I choose.

For some reason, I can't stand the thought of having the same device for two years. A year is the longest I hold onto a phone. And usually, its just ten months or so.

Who else has this 'problem'? '