Note: Management apologises for over-use of footnotes. But not really.
It’s not on TV Tropes, but it should be: a rising young star in the acting world is interviewed about his success, and he blathers something about process, and the craft, and the tricks he uses to get into his characters head. In the classic form of this trope, this explanation is a bunch of free-association gibberish that leads you to believe his ability is purely accidental, and that he is so utterly clueless about how he does what he does that you begin to wonder how he manages to do anything at all. And at the end of that long-winded explanation, when you have given up any hope of actually making sense out of anything the actor has said, he says “but what I really want to do is direct."
In this trope, the phrase is an expression of hubris: the assumption that if you can act then you can obviously direct, if only you had the chance. In the most common form of the trope, it’s patently obvious that the actor would be a terrible director, because he is, quite frankly, an idiot. In more sophisticated versions of the trope, the actor in question might actually be a competent director, but everyone assumes that because he has uttered those fateful words, he is an idiot. In either case, the phrase carries with it a level of stigma: the actor is overreaching. He is already a successful artist, why is he trying to be something else? How arrogant do you have to be in order to try to find success in more than one area of the arts, anyway?
With that in mind—in full knowledge of the hubris and the overreaching nature of the trope above—I would like to take this opportunity to say “but what I really want to do is write."