This gets at the crux of my angst along the OP's line: When I look at people who have dedicated themselves to that thing that they pored so many hours into, what I always wonder is, "How did they make the decision to put so much of their time into that thing." Like, I agree with OP that the Roller Coaster Tycoon one man project is really impressive. But there's no world in which I could possibly care enough about building a roller coaster video game to put that time in. And besides a precious few things that are ludicrously hard to break into - contributing to cancer research, working on nuclear fusion, space travel, etc. - it's hard for me to imagine pouring my soul into things that require so much commitment.