I've written applications using Java, Groovy, Clojure and Scala (in that order) and after Clojure, coding Scala felt specially horrible (yet another syntax to learn! ++: \ ~> and so on...).

Maybe Clojure feels odd for a few hours when coming from C-like syntax, but it becomes so obvious later on. I remember I felt terrified by the parens because I had not written anything serious in it.