Maybe I'm just a grumpy old developer, but the idea of learning yet another framework's opinion of exactly what the difference between a Model and Controller class should be, trying to fathom whateverissexy.js and working with yet another "awesome" HTML 5 framework where centering something on a page is still a mystery doesn't fill me with excitement at all.

Instead , I would prefer to learn something about "hard" computer science or something from a related non-CS discipline such as Math, Statistics , Psychology and find some way to apply that knowledge.