The most important question is if you want to find a job utilizing those skills. If you just want to work on your own projects then by all means learn on-the-fl

The most important question is if you want to find a job utilizing those skills. If you just want to work on your own projects then by all means learn on-the-fly. There's so many different things you can purse with programming skills so the advice you get will be very diversified too. In the end it's all about reaching your goal, so identify that and look at how you can get there. The definition of "learning" a language varies a lot too. I'd rather focus on particular functional areas. Generic knowledge of languages won't get you too far unless you want to be a teacher. I've done this and that in many languages but if somebody asks me which I know I never know what to answer. I tend to say I know none and that I just know a little about programming. Actually I don't find it that much different from learning spoken languages. When I know what I want to express/understand I find it very very easy to learn quickly. When I am in the "let's look for some new stuff I don't know mode" I tend to learn very little.