I like DEN too, especially the bright open atmosphere. My only complaint is there's really not much to do there and the airport is in the middle of nowhere. At least it's not as bad as YEG (Seriously... if YEG was any further south it could be called Calgary International). SFO's become my favourite because I go through there so much but the constant delays suck, you never know when you'll be in/out of there and it can so easily screw up an entire day's flying. I prefer the RCC in SFO over the one in DEN too.

I'll fly pretty much anywhere in the US but LAX... next time I need to come to LA I think I'd even consider flying WS to SNA. (Or flying myself to VNY ) Nothing is convenient about LAX. BOS and ORD also come to mind as pretty bad airports.