Fall in the Rockies is absolutely outstanding. I love the drop in temperature when the leaves change color.
Winter in Arizona is excellent. There was a time when I liked downhill skiing, but not anymore. Saguaro National Park is great in March.
Spring in New Orleans is mellow & relaxing, not too hot and not too cold. The food is great! The wine ain't bad either.
Summer in Yellowstone, backpacking is ideal. BTW, snowmobiling in the winter is an absolute kick. Absolutely frigid & and sub-zero Fahrenheit is normal, especially at night. Crunchy snow, so dress in the best down-filled stuff you can get your hands on.
I guess it has to do with where you are at the time