It's not really about it being a skateboarding game though. That's just the vehicle. I'm no big fan of skateboarding or skateboarding games - except Tony Hawk's Pro Skater series. There's just something about them. I guess you have to have played them to understand
I did a pretty cool trick in GTA3 the other day - I flipped the car, rotated it I think once and then landed perfectly. The game told me it was a "perfect insane jump" or something, so I was happy.