Picked up Assasin's Creed, damn I can't believe I didn't try it before. I always thought I wouldn't like it, but I was wrong, this game rocks. Being able to jump from rooftop to rooftop and dive straight down into haystacks like an athlete is just awesome.
I could have done without the whole research facility subplot though, actually so far it's the only downer of the game. It could have been a better game on its own without that bullshit.
The second game does a lot better with the future plot, tying the two together very well. It also doesn't spend a lot of time there, instead focusing almost entirely on the past.
I just finished Fable 2, and I can see why people didn't like it (the ending was fucking lame), but I enjoyed it immensely. The combat was a lot of fun.
Now I'm playing Batman: Arkham Asylum. Only a few hours in, and holy crap I love it.