Denver has some great things going for it, like easy access to mountains and outdoor space. But I must say its downtown is pretty unappealing. Many weirdos (similar to Seattle...) and chain restaurants. I enjoyed my trip to Colorado, but Denver was the most boring part of it.
The tourist part is always weirdos and chain restaurants. That's like saying there's nothing in New York because you went to Times Square and it was just a tourist trap.