Apart from the fragrance itself, one's skin type can affect the longevity of a scent.
There may be sillage that you are unaware of. It might be worth asking some of your friends/colleagues if they can still smell your fragrance hours after application.
Recommendations for something fresh & clean smelling?
Mugler's cologne (longevity will depend on your skin type)
Acqua di Parma - Colonia
Creed Green Irish Tweed
Creed original vetiver
Pasha by Cartier