Tom Wallisch comes from Pittsburg and every ones favorite AM, Stepp comes from roundtop? Both of those places aren't exactly the first place you look for good skiers. The reason the east coast generates great park skiers is simple; its the best way to challenge yourself out here.
The west has such great skiing. When I go out to Breck, its hard to find time to lap the park. There's just so much awesome terrain I never really think about it. At my home mountain the terrain is limited, and thats putting it nicely. The only real rush i get there is hitting the park and going big. For a lot of us, once you get to a point the only way to get better is to get to the park and practice that pretz 2.
tldr;
The park is the most challenging thing to ski on the east.
The park is the most challenging thing to ski on the east.