eI like natural scents. I like the smell of sweat, sun on skin, perhaps mixed with a hint of soap. As far as perfumes go, if you have to, I like like musk on guys, and something soft and floral on girls.

As long as you're clean, nothing. I'm allergic to a lot of that crap that some women dump on themselves by the bottle. Makes my eyes run and gives me a headache. It's happened in the past where I've had to get up and switch seats in a theatre because I just couldn't deal with my allergic reaction to what the woman directly behind me had on.

edit: never happened to me with men, but probably just because it's less common for men to do that.

No superstrong profumes.
Nice not too obvious scents are nice - a whiff of someoneʻs quiet profume, their shampoo, soap remains etc.
Clean sporty sweat can be nice too. And people smell different when exposed to sun. The scent of sun is nice.
Dislikes: onion, garlic or indian food smell on people. Some prescription drugs make people smell bad too (especially when sweating).

Nothing too strong, just something clean

I am not impaired but I can say this.

Women have a scent - Not a perfume scent either. Just a scent of something I can't describe other than flower like... I only dated one woman who had this pleasant scent on her that I found extremely attractive.