Celestial Amber resin
I have sampled through at least 5 different kinds of Amber resin in my time. Since Amber resin is a mixture of resins in the first place, there are probably hundreds of different types out there. This particular one is the best, at least to my nose. It is rich and sweet. A tiny sliver of this resin burned on an incense charcoal will scent a small space for hours. Some people find it overwhelmingly sweet. This tiny piece of resin will likely last years.
You can also just rub it onto your skin. Your body heat will melt it, and you will smell amazing for hours.