Because it's a nice hotel in a desirable location, and the rates are good? Throw in points earning, free breakfast and late checkout (for LTG like me), and maybe a suite, so why wouldn't I stay at a Hyatt? I like a suite as much as the next traveler, but if I don't get one, whatever. I'm not going to a hotel to stay in the room and never leave the hotel (except maybe the PHT), and when I am asleep I could be in a coffin and I wouldn't know the difference.