Oregano and thyme oils are some of my favorites. I can use them in my sauces and soups, they work great in my diffuser, and the oregano especially just makes me feel perkier. Why only 4 stars? Honestly, they can be a little overwhelming by themselves, and really need to be mixed with other oils, unlike lavender, which can be used by itself just whenever. Or at least that’s what my family says! Personally I like their spicy, leafy scents.