I briefly experimented with a Nexus One. I had it for two weeks until I sold it. 3G reception here in Charlotte is really, really good. No complaints. Work travel is infrequent but never had reception issues with the iPhone 3G I had before, when I did have to travel.
When I bought the N1 (after many days of mulling...) I immediately enjoyed the much higher resolution screen and overall performance. Android was great, not the incredible experience I thought it would be, but it was definitely a breath of fresh air. Then I noticed while at home, instead of the usual full bars I had with the iPhone, I only had 2- maybe three on a good day. Then I took it to work- 1 bar. This given the fact that I used to have full bars. I rebooted several times then tried to get Google on the phone to help me out. It took 11 DAYS. ELEVEN. Utterly and completely ridiculous. I was pretty pissed. In the end, I sold it for a little more than what I paid for it and bought a 3GS. I gave my wife the 3GS and went back to the 3G I had before.
My reasoning for trying the Nexus One was pretty simple. I LOVED having weather, calendar, and my notifications on my homescreen, and I loved using Google Maps. I didn't have to jailbreak it, it just worked. Honestly, I have to admit, I REALLY liked the live wallpapers. The Galaxy one absolutely mesmerized me. I wanted to just put up with the signal issues but the dropped calls were making me upset.
I'm hoping that the new iPhone does a few of the things above, without having to open "An app for that..." Maybe we'll see a modified lockscreen on what I presume will be called the iPhone HD. The resolution they are anticipating should make even the EVO 4G look low-res. My coworker has an HD2 and let me tell ya: it's just too big for a pocket. I wear size 38 jeans folks (so my pockets might be a little bigger than some) but the phone felt like it was going to break in half. Thus ended the fascination with that large, lovely screen.
To get back on track- the Nexus One was a fine phone. It just wasn't meant to be for me. Google's customer service needs some serious work. I'm definitely anticipating news on the new iPhone. Hell, it may even look different than the model we saw. Can't wait!