I use a 1-10 scale when evaluating my base flavors for 'accuracy'(does it really taste like pineapple?), 'candy'(does it taste like a hard candy of that flavor or like the actual fruit or flavor), strength, and for sweetness. This allows me to make a more accurate finished product, and minimize waste. If I'm making a cocktail type flavor (like a mojito or mimosa) I'd like it to be a highly accurate, low candy, low sweetness rated flavor. If I'm making milkshake type flavors then a higher candy and sweetness rating might work better. I have about 20 Vapor Renu flavors, 20 FlavourArt flavors, 40 Perfumer's/Flavorer's Apprentice flavors, and the balance being LorAnns, FlavorWest, or Ecigexpress Signature flavors. I also don't do tobacco or menthol, so most of my flavors are fruit, chocolate, cream, candy, and coffee type flavors.