No Case / Screen Protector, Still Like New
When I first got my Droid I got a hard snap-on shell from Verizon with it, but took it off the same day because it made it too bulky and weird feeling. I also put on the clear screen protector and used that for almost a year, but took it off a few months ago and still don't have one scratch on the screen. I've dropped it a couple times (once yesterday), and it's usually in my pocket and I'm not horribly gentle with it, but other than the gold paint flaking off of the camera button it still looks like new.
Just thought I'd throw this out there for those who can't decide on a case or can't find one that suits their needs, and to see if anyone else uses their Droid "bareback" and what the results were.