I voted Risen after looking at reviews for all 3. Seemed to be the most favorable for my specific interests (primarily meaning better praise for story-telling, characters, and narrative). But I'll probably grab whichever one wins.
Totally gonna buy Insanely Twisted Shadow Planet, and I don't even know what it's about. That name warrants the purchase price.
As for the flash sales and community stuff, the real flesh of the Summer Sale seems to be the flash sale system. Generally get the best deals (an extra 25-50% off what the normal sale price is). The Community Choice seems, to me, to mostly about giving a first or second chance at some of the flash sales with prior notice.
I actually like it, I think. Granted, I can't remember how they did it last year.
Anyways, you all are horrible, @#%^ed up people
Never underestimate the healing power of a massive dong.