I miss:

Trees
Dressing up
Live music
Zoos
Boats
Bison
Winter (you'd think in Wyoming or Montana or Colorado they'd have REAL winters, but oh no!)
Not having dogs bark in the morning or whenever I walk outside
The theater
Being able to walk everywhere (though I guess I can ride my bike...)
Everybody knowing who I am
Working for a non-profit
Having a basement
City water with fluoride in it
Being able to use wildlife as an excuse for being late
Small towns that actually DO feel like Northern Exposure (trust me, Lander is NOT one of them!)
Inexpensive curry powder
Edinburgh, and living in Europe
Being an ex-pat
Living in a place where almost everybody is a like-minded conservationist and liberal