Well, I've not been to Las Vegas, and the traditional reasons for visiting there don't much interest me.
I would however, like to visit the Grand Canyon and the Sky Bridge, so I could be convinced to do that from a Las Vegas standpoint. I would like to see some of the resort hotels there and try some of the celebrity chef restaurants I've read about.
I'm not much for the Las Vegas type of show and gambling bores me senseless.
I guess I'd try Las Vegas once, but I certainly haven't made much of an effort to do so!
You'll just have to make that effort on your next western US visit, won't you? ;)