Just switched from 1 to 2. I'm undecided. It is nice that is comfortable either way, which the Band 1 was not. For working at my desk now I'm wearing it screen up. I could care less about scratching the clasp (as long as it functions) but I do think when I'm away from the office I may swing it around. Not a big deal to swing it round, but I expect in a month I'll settle one way or the other.
When I first saw the clasp that jumped out at my is how much the UV sensor looks like a camera. I wonder with clasp out if people will think it is google glasses type of device that is capturing video? By the way is there a small CCD of some kind back there. Got me thinking if the refresh rate on it is quick enough could someone develop gesture based app. For example I have magic lantern on my Cannon DSLR, and they use the eye sensor on camera to make gesture based camera shutter (three quick waves in front of sensor to take picture). Gesture based controls would be very Microsoft way to do things.
Update: Now that I'm back at work I'm biking, and for the band 2 I like the face out for biking. When I bike I have my wrists bent back. with the clasp on the outside and the band snug it can fell a bit sharp against the back of my hand. That didn't happen with band 1 clasp.