While talking with some game developers this week there was a particular phrase they used a number of times which stayed with me.
They talked of 'juiciness' in the gameplay.
Afterwards we looked it up to see it as a real thing or simply a foible of our gamer guests.
Turns out that 'juiciness' is an proper piece of gamer vernacular, and describes a type of feedback message, either in actual words or through sound effects or images, that help to create encouraging positive responses by rewarding a player when they perform an action successfully.
This is duly being filed in the lexicon for those times when saying 'elicit an emotional response' or describing heuristics or other such system one type responses is perhaps overly scientific for delicate client paletes when reviewing their new advertising.
Never mind the differentiation/positioning/loyalty metrics, feel the juiciness.