I like EOs for the way they make my home smell nice. That does uplift my spirits. I use several citrusy EOs for the daytime. Around the holidays I use EOs like cinnamon, clove, orange to make the home smell Christmas-y.
I can attest that bugs hate orange EO. I have sprinkled orange EO drops in places to chase off spiders and centipedes.
I hadn’t thought about diffusing oil of oregano or another EO for colds and flus. Must try that.
I have a sibling who swears that there are certain EOs that when diffused calmed down her (now grown) kids around bedtime and naptime.
I did buy some expensive EOs through Tropical Traditions. The brand is called Florihana and comes from France. I do notice a distinct difference between cheap and expensive EOs. They smell different, they smell stronger, and you use many fewer drops.
But Florihana is expensive. Nowadays I buy NOW brand from Amazon. Reasonably priced.