Encompassing oils like Wild Orange, Lime, Lemon, and Bergamot, citrus aromas are usually easy to identify. They smell fruity and clean, with a bit of a sour bite. Citrus notes are most often top notes.Vanilla. The soothing scent of vanilla is a favorite among perfume-makers, but it can also promote stress relief and relaxation. Vanilla can have sedative effects on the body and can also work to reduce hyperactivity and restlessness.