This is going to be an odd one, but for the physical build quality, the Motorola Devour was actually really nice. Some poor design and budget choices made it a loser as a smartphone, but the feel of it was incredible. Aluminum, perfectly weighted and snappy slider, stealth removable battery and micro SD slot, bumpers in the right places for durability, keyboard that I loved. Of course, the crappy fixed focus camera, oddball set of 3 capacitive buttons and notification light location, and combination of Motoblur and being stuck on Android 1.6 with a 3.1" were killers. Oh and the absolutely TERRIBLE reception was the nail in the coffin. Returned mine pretty quickly and got the OG Droid instead.