Oh what a great question ...I hope this goes on and on! I love to hear all the things you do to keep your rooms smelling sweet!
Of course, my creative sanctuary smells divine. I planted roses outside the window, which I keep open without letting in the dust and dirt and bugs (just call me Martha Stewart!)
Seriously, the quilting lab in my house - right this minute - smells like
1. fabric purchased but unwashed which has a slightly odd scent
2. whatever was stuck in the fireplace and died but I don't want to move the piano in front of the fireplace and then unscrew the board over the opening to find out.
3. The old books I can't bear to throw out which are crammed into the upper shelves of the closet, right above the boxes of photos and negatives from 30 years of family life which probably also have a chemical odor
3. Old wood furniture and polish
Possible residuals from that nasty spray starch and 505
4. Overheating metal lighting and warm plastice sewing machine
5. Windows closed tight not to let in dust and dirt and damp and bugs. Dying for room a/c but too cheap!
Good thing I am not scentisitive!