I played FEAR at both GDC and E3. Its hard to remember now, but I think I enjoyed the E3 demo more because it was a bit more challenging and I got my ass kicked a couple of times. And it was also cooler because the "time-distortion" effect was fully implemented in the E3 demo and it was cool to shoot bad guys in slo-mo and watch the physics do their thing.
I can't wait until this finally comes out, its been a while since I've played anything from Monolith. I'm also looking forward to Condemned, but not as anticipated because a lot of its gameplay hasn't been talked about or shown and its E3 demo was just running (ie. walking very slow) around and bashing people.