Well for an old stick in the mud like me, any trip out is exciting. So my recent jetting to Denver was lots of fun. Denver is where I grew up, so it's very much like a salmon returning home.
I especially enjoy looking out any airplane window. I'm one of those flyers who spends the entire trip glued to the window, since I'm fascinated with every little detail.
My favorite views out the airplane window are the empty landscapes of the West, where I always imagine how wonderful it would be to be way out there, 100 miles from anything, without anything to get in the way of anything.
The Denver Art Museum is fabulous... (photos) I think it's lots more impressive than the Seattle Art Museum. Also the Denver Zoo and the Denver Science Museum are totally world class... head & shoulders above their Seattle counterparts.