Whatever turns you on is a phrase that is typically used to express a sense of approval or encouragement towards someone else's preferences or interests. It can be taken to mean "do what makes you happy", but there are plenty of synonyms for this phrase that can add a bit more nuance or variety to the sentiment. Some other phrases that convey a similar meaning might include "do your thing", "follow your passion", "pursue what excites you", or "go after what you love". All of these alternatives could be used to express the idea that people should be unapologetically themselves and pursue what makes them feel fulfilled, happy, and alive.