Personally, I'm very impressed with the Droid I'd purchased. It's certainly done a lot more incredible and enjoyable things than I've seen anyone go on about in the forums.

I have excellent navigation, my phone features are excellent, visual voice mail is excellent, the screen is very excellent, the available library of applications is enormous and I can STILL hack it if I'd wanted to (rooting) but I specifically do not want to do that to what I depend on as my phone (hence why I never wanted an N900 and preferred an Internet Tablet) but I've been surprised with the number of things I can do with it that I never needed to be root to do after all. I can even script little doodads in my favorite script languages (like Python or BASH without rooting)!

I still want a hackable little computer to play with, but the N900 will certainly not be it due to the higher cost to lower features ratio.

As for the Nexus One, I have to admit that I think I would have prefered it over my Android. I personally don't like/need a slide-out keyboard.. and the DROID keyboard is terrible. I also prefer its styling and sleek thin body over the Droid phone. All that being said, however, I prefer to avoid GSM network technology for a lot of reasons.. but they do have a Verizon CDMA version in the works, which I'll prefer. I'll likely give my Droid to my mom at that point.

But like colnago said, it's really a personal preference based on what you need... those were my particular preferences and rationales. Your mileage may vary.