Washington - Been there twice (the '89 Sal game; the embarrassing loss to Neuheisel). Love the setting, but with the track, the seats in the bowl were about 100 yards from the near endzone. The new stadium will not have the track, so it should be an even better venue ... and even louder.
UCLA - Concur about the Rose bowl. Nothing great about being in a crowd of 70,000 ... when it still feels like the stadium is empty. Still, it is the Rose Bowl, and a must stop for Buff fans.
Oregon State - the stadium in Corvallis is probably the worst in the Pac-12 (though I'll be going to the Washington State game this fall, so I'll reserve final judgment). Corvallis is a cute little college town, but no mountains, no ocean ... nothing going on really.
Arizona State - Went for the "Sandbox" Fiesta Bowl against Syracuse (the field was a mess). Nice stadium, but nothing about the campus impressed me all that much. Not interested in 90-degree football.
Utah - Driven by the stadium, but haven't been to a game there. Campus is nice (verrrry clean), with great views of the Wasatch Range. Sounds a lot like Ft. Collins ... and I have no problem turning the Utes into our little brothers!