Like others, for me these overlap a lot. My happiness language isn't the one I think in. I think in Java, and a bit of Javascript for functional programming.

Like others, for me these overlap a lot. My happiness language isn't the one I think in. I think in Java, and a bit of Javascript for functional programming. However, neither of these are very fun for me. When I have spare time to hack for fun, I'm usually using Ruby or Scala. My GTD language is PHP, and Java when I need things PHP doesn't provide. My $$$ languages are Java, PHP, Javascript, and Objective-C (iOS). All of these are languages I'd rather not be coding in, but it's where the jobs are mostly. There is a lot of overlap there. I think it's because for me productivity IS fun.