1. Sprint Pre 1
Great phone, lasted me almost two years. My wife's disintegrated, though, so as users know, your mileage may vary.
2. FrankenPre 2
Ugh. Don't even get my started on this. I know some people here are really all about this FrankenPre 2 thing, but it was nothing but a mess. Calls and text messages that never came through, random reboots, doctoring the device every couple of weeks near the end. And since my wife was pregnant, I couldn't have such an unreliable POS.
3. Motorola Photon 4G
Replaced my (ugh) FrankenPre 2 with this phone. Great, beefy worldphone until Motorola killed it off by making a promise to upgrade it to 4.0 and then...dropping it.
4. LG Optimus G
So I replaced the Photon 4G with the Nexus 4's LTE-packing brother. 100% Pure Awesome, and Consumer Reports #1 Smartphone. Fastest Android smartphone out there with the (maybe) exception of the HTC DNA. This phone is very well built, the speed is blazing, and since I'm now in a Sprint LTE area, downloads are fast as all get out. 32GB storage and a 2100mAh battery right off the bat and I don't need to charge it for a day and a half with moderate use.