I still use the original droid actually, but my brother has gone through the X1 and recently the Thunderbolt so I got to test them quite a bit.
He returned the TB because of the battery issue with LTE, the screen is beautiful though.
The X1's balance just always feels off for me because of the hump for the camera.
He agrees that, despite the physical keyboard, which is a waste of plastic, the OG can really outshine any current Droid Model, minus the screen size of course.
Put it this way, I've had 2 upgrades for 3 months now and I still haven't upgraded.
I was excited about the Bionic because it looked like a much more comfortable fit, plus it still has the larger and more high end screen.
I have high hopes for the Bionic, it won't rule the world, but when I saw it at E3, I said, "Wow, I want that." And I've yet to have that feeling with any other phone I've used/seen since I got the original Droid.
Yes, the Bionic may not even come out, yes it might get redesigned, but I think we can all agree, it looked sexy as hell at E3 and it's got one awesome name.