Is there a particular smell you like? Usually I'm not sensitive to smells, and I never recognize a perfume; to me they are all the same. I can only recognize the smell if people pour an entire bottle of perfume on themselves, and they reek of it.
There are some other kinds of smells, however, that I like very much. One of them is the aroma you find in a kitchen when you prepare food, especially the smell of onions lightly fried in oil or butter. That smell makes my mouth water.
What is impressive is how good an aroma can be at the beginning when you are preparing food, and how smelly it can be at the end after you have finished eating and haven't aired the room. What is your unusual smells you can share with us?