Alas, Haskell has resisted my attempts at learning it far longer than Lisp. If I wanted to go in that general direction, I guess, I would look at OCaml, which

Alas, Haskell has resisted my attempts at learning it far longer than Lisp. If I wanted to go in that general direction, I guess, I would look at OCaml, which seems to offer many of Haskell's benefits without being quite that weird.