Flexibility of the language I imagine. Function application: point free or not? Control flow: Monadic? Continuation passing style? Do you prefer to use Functor

Flexibility of the language I imagine. Function application: point free or not? Control flow: Monadic? Continuation passing style? Do you prefer to use Functors and fmap or list comprehensions to build lists? etc etc. In Haskell it's natural to define new functions which embody the control flow you want to express. This means that the way you prefer to solve programming problems tends to be reflected in the structure of your programs in a much more obvious way. It's a bit like Lisp in that sense: consider that in lisp, you might write appropriate macros to structure the solution to your problem, and your choice of solution will then show up in the syntax of the code you write in a more obvious fashion than if you were writing in a curly-brace language, where the fundamental atoms of code remain the same regardless of your style of programming.