The enormous flowers of big leaf magnolia smell… extraordinarily good. (This is evidently a quick way of telling Magnolia macrophylla from the similar large-flowered Magnolia tripetala, which stinks.) I smelled a very refreshing citrus, a nostalgic cola, and summertime. And I smelled it yards and yards away.
Backyard and Beyond 
Love that you name them. I try to name mine too — not always successfully.