If I were ridiculously rich I wouldn't work (or, at least, not full-time) but instead I would spend a decent portion of my time attending lots of various courses - joining them and leaving them on a whim. It definitely wouldn't be the "investing in myself" crap - I would do it purely for pleasure and wouldn't give a damn about whether it is useful or not.
Right – I found what seems closest to my "vocation in life." (I always suspected it'd be "doing lots of various things"...) The only thing I have to do now is get ridiculously rich.