My sister’s boyfriend is a flavor scientist; he designs flavorings for soft drinks.  He told me two things about the business:

a) The flavor that tastes “right” to most people often isn’t the actual flavor of the purported fruit/spice/whatever.  For instance, a flavor compound naturally found in peaches might be the magic ingredient to make a raspberry-flavored drink taste correctly raspberry-y.

b) “People really like anything that’s sweet and red.  People are basically hummingbirds.”