My $0.02 if anyone is interested.
Red Bull Type - GREAT mixed at 17% flavor plus 2 drops, may need a bit more
Black Cherry - very good, just eyeballed a mix but was maybe 10%
Peanut Butter - Tastes like a spoon of peanut butter, 15%
Caramel, white chocolate, Blueberry- all very good, 15% mix...