I initially picked up Haskell because I hadn't done anything that was lazy by default, which - when you focus on pulling at that thread - can be a pretty big di

I initially picked up Haskell because I hadn't done anything that was lazy by default, which - when you focus on pulling at that thread - can be a pretty big difference from any of the ones you've mentioned. The syntax is pretty close to ML, for sure. Ultimately, it's the type system and the pervasive immutability that I miss most when I'm working in other languages. The ML type system is related, but the differences (in both directions!) are interesting.