I see people waxing poetic over Ruby a lot saying that it's a language "built for the human". The thing is, every language is built for humans (or at least should be) but we tend to have different definitions for what "built for humans" means. Ruby certainly has some clean and expressive syntax, but I personally find it difficult to use because of its dynamic typing (which makes it hard to know what the types are while I'm writing it) and the heavy use of macros and other magic (which does unknown operations without my knowledge and introduces symbols into the scope mysteriously). That said, it clearly works great for some humans, just not for this human (me).