Local forests more or less at valley-bottom level: red cedar, Douglas fir and hemlock, with larch, white pine, ponderosa pine, birch, balsam poplar, and alder mixed in here & there. The duff on the ground in there smells great, too, especially after a rain.
Freshly baked bread. Freshly cut red-cedar boards. Southern cedar (here only imported in thick sheets or small boards). Freshly-ground coffee. Barbecued food items. Mexican molé sauce. Pine & juniper incense brought back from the American Southwest.
Like some of the guys around here, I occasionally do some practical work with carbon steel. I (and my next neighbor too) like the scent of freshly cut steel (but we suspect it wouldn't be good to inhale it too often).