I am college student in Junior year. I am comfortable with building ruby on rails applications.
I have not been able to decide whether I should keep building on my existing skills or I should explore new fields? For example, if I have some time at hand, should I spend that on reading source code of rails, learn things like Meter, Node.Js, NoSQL etc or should I explore completely new fields like software development with C++&#x2F;Python or may be android&#x2F;ios app  development? Big data and AI are quite interesting as well.
You guys must have made this decision at some point.
Ask HN: Perfect existing skills or build new ones?