I hated the competition/terrain park sections in Stoked. They would have been fun, but apparently the park didn't agree with the game's physics engine. I'd always end up getting stuck in a wall, then glitching out of it, and ruining 2 good runs by having one terrible glitched one.
That was my main problem with the game. That and the game always picked the worst possible angle for still photos, my scrap book is filled with pics of my leg, or close-ups of the bottom of my board.
Oh, and Travis Rice being 3000x harder than any of the other challenges.