

Clojure is simple, is a lisp (huge plus since they are super simple and you gain access to a whole realm of languages), and practical. You can do anything from backend to frontend dev with it, and the philosophy and community are lovely.
Scheme is less practical but easier to start with.
Haskell is the least practical but isdefinitely beautiful and helps you understand things better.






The bad part is when you learn vim bindings you want to throw up when you use any other editor.