I love to visit Utah, but I really, really love the diversity where I live, the full four seasons, the mildly humid air during mild weather times, and a lot of other things.
I miss the mountains, BYU, being immediately built-in to a community through a tight ward geographically, the restaurants, the easy callings (IMO, across the board they are almost all easier in Utah), the community stuff for families, and honestly, the people in Utah can be really great.
I don't miss the vanity, the Utah fans, the heavy blizzards, the inversion, the MLM culture, or feeling forced to go to events for extended family like baptisms and what-not.