As a vegetarian: the smell of a quality sausage being fried.

Stinky tofu. I know it's supposed to smell like an open sewer or other such insulting comparisons, but to me it smells like a delicious meal about to land.

Sweaty gym dude smell that’s kinda like hot dogs and beer and feet combined. Love it

Those giant metal permanent markers and yo mom's feet.

The local species of squash bugs. They're a lot like stink bugs, when you disturb them they emit what's commonly described as "a foul odor". Except that foul odor in this species smells like a super concentrated artificial tutti-frutti bubble gum scent to me. It's overpowering to the point that it almost burns your nostrils at first, but it fades super quickly and doesn't linger like regular awful stink bug smell.

Xylene. I think it's maybe used as a paint thinner in some cases? I work in a lab where it is used daily in fairly large quantities (although not for thinning paint). I love it. Highly toxic tho lol.

Ether

Old books/old libraries

Oil, turpentine, Coleman Campfire Fuel

Nicotine, and antifreeze..

Chloroform

Sweat

Magic The Gathering cards, pretty sure it's some part of the lamination process. Under the house smell, earthy aroma that has stagnated for a few years. Moss covered valleys and crevices, basically where moss is so concentrated that it just jumps into the nose.

Durian. It smells sweet to me. Everyone else wants to vomit...

Diesel - not sniffing the container, but smelling burnt diesel in the air. Also the slightly putrid smell of a creek after it rains and all the gunk has been moved around and the sun has been blasting it and you can almost chew on the odour, it's that thick. I rather like that.

Tobacco smoke