Are you serious? LA is god awful. Pullman, WA makes Ames looks cosmopolitan. Tucson is nasty. The Oregon schools are pretty much like midwestern college towns.
I'm not sure where this sexy perception of the Pac comes from.
Have you actually been to any of these cities/towns?
I live in Seattle, and Seattle is out-freaking-standing. Love it.
Pullman is like a midwestern college town, as is Corvalis. If you like Ames, there's no reason to hate on these two towns.
LA is fun to visit - just spent a long weekend there a short time ago. Even if it isn't your thing, if you can't enjoy yourself there for a weekend, I think that is on you.
Went to the ISU-Cal bb game, and really liked Berkeley. Fun town, lots going on. And San Francisco is just a short BART ride away. Same for Stanford.
Tempe/Phoenix - sort of a generic big city, from what I've seen. But again, if you can't enjoy yourself there for a weekend, I think that says more about you.
Tucson - never been there, but Calexico and some other great bands live there, so it can't be all bad. And a close friend of mine - who's travelled around the world - calls it her dream city. She's a romantic like that.
Eugene - never been there. But I have a negative impression. So I'll give you that one.