In no particular order (and I may come back with more):

Hickory nut rind, it’s the smell of the forest for me (other good ones are sweetgum leaf and tulip poplar leaf)
Woodsmoke
Good fresh coffee
Cedarwood
Amber
Myrrh
Osmanthus
Bison grass 
Rose and peony 
Clove
Cardamom
All the citruses and their flowers
Sunflower 
Hazelnut
Almond
Tomato leaf
Rosemary
Star jasmine 
Jasmine 
Gardenia
Jujube flower 
Honey locust pod and flower
American persimmon fruit
Good vanilla 
Leather 
Clay and glaze tend to have a subtle particular smell (not reclaim, which is stinky, but the fresh stuff)