Aroma

This is the dictionary's explanation of Aroma:
1.
an odor arising from spices, plants, cooking, etc., esp. an agreeable odor; fragrance.
2.
(of wines and spirits) the odor or bouquet.
3.
a pervasive characteristic or quality.
Everyone has a different opinion of what a good aroma is or what isn't as good. What may excite one person may totally distract another. Some people may even remember what their first love smelt like and long to smell that scent again, while another may run for memories of remorse and heartbreak. Each individual smells differently just as they taste differently. Sometimes a certain aroma can trigger a good memory while others will do the opposite.
Some aroma's even have a healing effect. They trigger certain senses that trigger other systems of the body which release hormones and nurochemicals. Smell is different from the other four senses we have because it triggers the part of the brain that deals with emotions and memory. This is why when you smell an aroma you usually comment " that smells like....".