I traded in the Droid for the Eris
I had the Droid for four days before making the decision to trade it in. Three main reasons:
1) The Droid physical keyboard was not useful for me, I just could not type on the thing. So it was just useless weight for me.
2) The Droid to me didn't really feel like a phone. Too heavy and clunky. Couldn't slip it into my pocket.
3) The Eris design layout is just more pleasing to me - two physical buttons on the lower front, and four screen buttons above those. Just seems to work better for me.
Add to that the weak Droid camera, and the additional $100 Droid cost. And I think HTC is going to upgrade this to 2.0 very shortly.