So many that could be listed...but the first ones that come to mind that are bow hunting related:
The smell that hits my nose after I make a 2 hr drive to the Ouachita Nat'l Forest in SE Oklahoma to hunt black bears. (It's a heavy pine scent that isn't usually present in the NE region of the state.)
The smell of the campfire that I start using the pine needles from the forest floor, later that night.
Fresh Earth scented ANYTHING! (I LOVE that stuff! LOL!)
The first cool evening in the fall. Such a welcome and exciting aroma after a long hot summer! It's the smell of hope, and of wonderful days afield ahead, to me.
The heavy dew on new green growth just before the sun breaks the horizon in the early spring. It's kinda bittersweet to me though, because it means that turkeys will be available for hunting again, but also that my favorite seasons are over, and that hot weather isn't far away.
Honeysuckle in the air means it's full-on 3D season again, and that is always great times with family and friends.
The smell of gunsmoke, the scent of a woman, they get my blood pumping like any other man, but well, that's another topic altogether....
Great topic!!!!