I love the smell of the crisp cold Autumn air, especially in New England. It snaps you awake in a relaxing way. One of the few things I like about this part of the country.
The scent of grilling meat, don't care what kind, always makes me hungry.
Pretty much all the oils/fluids for a car, except the 'old tyme' steering fluid. I think it used to be made from whale oil or something and it stank horribly.
I have to find out what perfume my co-worker wears, because it makes me wanna hit it.
Garlic anything makes me hungry, but that's probably because I'm Italian.
One other scent that I will always remember was my grandfather's 60's Volvo interior. He used a special cleaner/conditioner on the leather that was just awesome. I guess that one I liked because we always drove to places as a family (Gramps, Dad, Mom, and me) in it when I was growing up.