What, no D3 thread yet? I'm disappoint.
I have it installing right now, so I will be back with updates as to how I am loving it.
I will most likely play through it the first time as a monk, both because I usually play monk-like characters in MMOs and D&D and because they look like they have the highest skill cap in the game.
If you're wondering, 'What is Diablo 3?' then I apologise for you living under a rock for the past five years. Now go buy the game and love it. LOVE IT.