You pretty obviously can’t do whatever you want. From a legal perspective you’ll be arrested and prosecuted if you commit a crime. From a philosophical perspect

You pretty obviously can’t do whatever you want. From a legal perspective you’ll be arrested and prosecuted if you commit a crime. From a philosophical perspective you have a moral duty to do good, by virtue of the intrinsic definition of good (whatever that may be in your ethical framework). Even if your ethical system says you should only do what makes you happy, you still have a duty to fulfill that goal as it is internally equivalent to the concept of good.