The Sonoran Desert is beautiful and so is Joshua Tree. I've never ridden in either, though.
After living in warm climates for 23 years, weather doesn't enter much into the equation of what I like, though. I like change! I'd like to ride more in the PNW. As I get older, I find that I mostly enjoy visiting places where I would feel comfortable living; beautiful scenery is one thing, but if I can't deal with the values of the place, I can't get past that. Maybe it's immaturity, but since I've become more like this as I age, it's more than that. My son and DIL just came back from a road trip/visiting her relatives in 2 different states and kind of said the same thing last night. He has traveled quite a bit and lived in Europe for 6 months. She has not been to that many places, though. I don't necessarily think where I live is "the best" for everyone and everything, but in those 23 years I lived in the sunbelt, I never felt comfortable, despite good jobs, friends, nice home.