I understand that most, if not all, of the things I listed can be applied to programming languages in general. I am interested in learning what other fields I can apply my knowledge of JavaScript in. Of course, I could build a website or an app for any field, but to me the medium is different if I were using JS for game development vs. for programming a NodeBot. Maybe it is more a question of the limitations of the language...
The language is a tool, not an objective. My suggestion would be to take a project you've already built in JavaScript and rewrite it in Io (another prototype-based language), because it will teach you to separate the problem from the solution.
Beyond that, find a problem, fall in love with it, become obsessed by it, and look for ways to solve it.
