Good smelling things
I’ve never been much of an olfactory dependent person, I think most people aren’t. On the other hand I do know that my sense of smell tends to be better then most other peoples.
Some recent good smells I’ve noticed:
The air when rain is coming (called “petrichor”)
Fresh cut Pine trees (vastly different then the typical Christmas Tree smell)
Good quality dirt
I’m sure a physiologist (and even a phycologist) might have something to say about the fact that all the smells are food related, or outdoorsy.