I don't have one particular favorite smell.
I do love the smell of the dryer running. When I lived in the co-ed dorms the dryer vents were located by one of the side stairs into the building. I suppose it reminds me of fall days when the air is just starting to turn crisp. Even in the last apartment I would be transported to me at the age of 18 or 19 walking by those vents.
It wasn't until this year's Ohio Corgi picnic that I learned Zilla's smell was not unique to him. Dogs sweat through their feet and I thought his feet smelled like frito's. Corn chips and popcorn are common smells when the food is corn-based. I never went around smelling his paws though. I can't describe his smell, though. It's a dog smell but not sour or dirty.