Many of the benefits of essential oils have to do with their aromas. To see how different aromas and chemicals in essential oils effect on your emotions, check out the oil properties wheel. However, other research also shows that essential oils can help the body in more ways. Physiology aside, whether or not an aroma is appealing to you depends on personal preference. So how do you know if you’ll like the scent of a blend of oils that you make yourself? This guide can help you decide.