Yep I know the feeling. I like Ocaml (and also Clojure) so much that it's one of the few languages were I'll actually don't really care about what I'm programming on as long as I get to use the language.

Building real things is great, but honestly for me one of the most satisfying things is just programming in an expressive and clean way for its own sake. It's great when you get a language or a tool that faciliates that.