T-Mobile G1 or the HTC Dream for those in the rest of the world. Personally my second favorite phone. Dropped that phone thousands of times and never had the screen shatter, or any damage other than a dent on the chin. Plus the trackball was actually pretty nice for navigating.
Galaxy S3...and other than not really being able to see the screen outside, I love it. This coming from a guy who has had numerous blackberries and apple products.
I delved into the Android world about 2 years ago, with an LG Optimus V on Virgin Mobile. Coming from an HTC Touch Diamond with WM6.1 on Verizon, the Optimus V was pretty good! I used it as my daily driver for about a year and a half.