I made the transition from a Motorola flip phone on Tracfone to the Droid 1. The only thing I miss is not having to worry about scratching/breaking the screen when it goes into my pocket.
Before I got my Droid in February I was using a Samsung Glyde...I had to get 5 replacements because it was such a piece of crap and Verizon wouldnt let me do anything but keep getting another one of those phones every time.