Yes - I think once you start being productive with Haskell you prefer to work in languages with strong type systems that are purely functional (Haskell and subsets of it). When I work in Haskell it feels like a burden has been lifted from my shoulders - for real! Coming back to JS is simply painful.

I think more programmers would experience this if it weren't for Haskell's insane learning curve. It took me a ~year of casual learning and skimming before I could do anything useful. Very casual, though ;)