About the only thing I have to add to my previous description of Tulsa (flat, green) is that it's not very populated. There just aren't that many people there. Oh, and it's very big, too, which makes it seem even less populated than it is.
It's also in the middle of something of a identity crisis. Traditionally, Tulsa's been an oil town, but that business has apparently been on a decades-long slide. So there's a very public debate going on about what exactly "Tulsa" should be. The fact that the Tulsa Philharmonic folded recently has only intensified the debate. The fact that American Airlines, the largest employer in the area, just laid off a whole mess of people, isn't helping any. And, of course, there's the elephant in the room that no-one talks about.
Tulsa Opera itself seems to be doing well; the performances that I saw while I was there were of extremely high quality and very entertaining. The Tulsa Performing Arts Center is an excellent place to see an opera -- the acoustics are good and the sight lines are clean. And, best of all, the tickets are relatively cheap.
It was, over all, an interesting visit.