I've seen everything that Steam Greenlight has to offer, here are they are
The Best: Routine; survival horror based on 80's sci-fi, easily the best graphics and trailer out of everything up so far, day one buy for me.
Other games that look promising:
Submerge underwater 16 player RTS
Pitiri 1977 RPG/platformer set in the 70s
Neocolonialism Destroy the earth in the most boring way possible, count me in; seriously.
There were a few games that I'm hopeful for, but they could easily go either way:
Saturday Morning RPG hands down the best concept in the whole greenlight catalog, best concept I've heard in awhile in general, but the art is god awful in the game as it is, the whole game looks really rough, hope they don't rush this, it could be great.
Pro Wrestling X: Uprising again, this game looks really rough and I'm not really a wrestling fan, but the guy says he's trying to make it like the classic N64 wresting games and those were just good games period.
In Verbus Virtus completely voice controlled game, probably going to suck, but it's definitely something new on PC anyway. Graphics look to be pretty good quality and stylewise.
Project Zomboid Zombie sandbox, overhead perspective, looks interesting, pure survival. I think this is the highest rated game in greenlight now at 5%.
Now for the worst:
La guerre des galaxie MS paint / cut and paste your way to a game.