Transformers demo is pretty awesome, and I normally hate that sort of game.
Sleeping Dogs demo annoyed me to death. It felt like a hybrid of GTA, AC and Streets of Rage, but not as good at the things it borrowed as any of them. Don't think I could make it through the whole thing.
Been playing the Dust 514 beta. The concept is ambitious and fascinating, and the gameply has moments that are quite cool, but also balance issues, a very awkward interface, a touch of gear overload and waaaaaaaaay too much functional stuff currently unexplained. When you finally figure out how to get some new thing, just equipping it can be tricky, let alone using it correctly. Also, it's looking increasingly like the promises of not being "pay to win" may be well on their way to being broken, imo.