Another fan of freshy-cut grass smell here c: I read somewhere that it contains a chemical which reduces stress, so that's a plus. even if that's not true, it's still rather lovely.
Same for the after-raining smell..
also, the smell of snow o.o not in a picking-up-handfuls-and-sniffing it, but the cold, sharp smell that's everywhere after it's been snowing. Reminds me of belgium, lolol. and that's a good thing.
Vanilla! that's a good un. I do love that. Same for baking bread and bacon, mm.
I can't stand the smell of petrol D: So many people I know love it, but it just makes me feel ill [which when combined when the motion of a car, is fun for everyone!].. really hydrocarbons and, weirdly, esters on their own.. aiiee.
and yet I love organic chemistry. Go figure.
Here's a weird smell-I-love which might be my favourite: disinfectant. TCP, bleach, antiseptic.. I don't go around sniffing bottles of the stuff, but I love the smell of a room after it's been cleaned, to totally contradict with the nature-loving smells above o.o
Thus making me one of the very few people who actually loves the smell of a [clean!] hospital.