My weapon of choice is Clojure and I don't really agree with this post. There is a serious lack of tutorials and guides to get basic things going, the documentation is all-around horrible, and in general, Clojure is a very difficult language to get started with, though it certainly has improved immensely over the past year and it is rewarding once you get past the initial humps and start to really grok it. Clojure is philosophically, a beautiful language, but you have to work very hard to get to that point. And may the programming gods have mercy on his soul if he prefers using Windows.