With so many frameworks for web development what should I choose and why?

There are a lots of web frameworks with different scopes (React, Angular, Polymer, etc.). So many that everyday when I wake up and surf a little, I find a thousand more.

Months ago I was learning Angular 2 but I stepped aside to learn React (by a friend's advice). Angular 2 is great, but it is in beta and I needed something for production.

Right now I am learning single states with React-Redux.

What do you think I should add to my to-learn-list for the next months?