I love Skate for its realism. You can't just pull off random 900's like in THPS. :P
The control scheme is pretty innovative, too. Instead of holding X to push, you tap Square or X a few times and your good. Grinding isn't Triangle, you can just just Ollie onto the railing, and instead of directing falling onto the floor, your actually sliding off the rail if you aren't balanced. The moves you can pull off with the Right Analog Stick is as interactive as it comes, no more Squares and Triangles to do moves. The camera angle is also pretty cool.