BABIES!!! I love the smell of a little one, especially after a bath.
Fresh air.
As a 5 or 6 year old, I used to run between two box hedges in my grandfather's back garden. When there was dew on them in the early morning, I would deliberately hold my hands out to spray the water in the air as I ran.
I smell box hedges often (even yesterday at the RSPB headquarters in the UK).
I'd like to be able to smell that smell and remember my grandfather's garden forever.
The smell of chocolate chip cookies baking.
Rain
Fresh cut pine.
Strawberries
Ocean Breeze
After Rain.
My wife's hair, especially when she's dressed to go out.
Flowers.
The air at the sea
That ozone smell after a thunderstorm.
Oh and maybe vanilla, if I could have a second choice.
lavender vanilla.
The smell of my crush's cologne who left a big scar on me.