Anything with black salt in it. Eggs don’t bother me, but the extra sulfurous scent in black salt is so off-putting to me. Tasty when used right, tho!
Used to be able to say natto, but it’s so tasty, cheap and nutritious that I’ve overcome my aversion and now it smells good to me.
Honorary mention to Swedish cod roe paste (Kalles). I, personally, didn’t mind the smell, but my roommate would call it “pussy paste”. She was more nose sensitive, it seemed, though, as she was the only roommate who very politely asked me to wait until she’d eaten before I prepared the natto.