Maybe, maybe not. That kind of stuff is harder to quantify. I know just the little bit of Scheme and Haskell has transformed how I think and my thought pattern

Maybe, maybe not. That kind of stuff is harder to quantify. I know just the little bit of Scheme and Haskell has transformed how I think and my thought patterns. I can say the same about learning to play Go (the game, not the language). Now, whether you get anything out of it, that's up to you. It's not really about learning a language that fit your mindset so much as learning a language to change and expand one's mindset. If you expect a language to fit your mindset, then you're unlikely to get anything out of it. In which case, definitely stick with the popular languages with a lot of community support. That has a pretty good ROI too.