I used to live in Southern California and would go to Magic Mountain as a kid, which is one of the biggest theme parks in the world. They have like 12 coasters or something now, and some really gnarly ones. The problem however, is that since I no longer live there, that place pretty much ruined theme parks for me. The only theme park really in the PNW (Silverwood) is about 30 miles from me but it's so small compared to Magic Mountain I have no motivation to go.
It's like powder, once you get enough of it you don't want to ride anything else.
PowderHound and TreeNinja