Easy to answer for me personally. I don't specifically care about the syntax family of the language, but I found Haskell (and functional Scala) to be pretty much unreadable. I have no problems with Lisp dialects or ML, or C-family or a lot of others... but Haskell with its heavy use of symbols instead of words... nope. I seem to need a certain 'instant hook' from which I can learn. If there are only symbols it won't work. Maybe that's also why I always found reading and writing math much harder than grasping the concepts. (I studied Computer Science, not real Math ;))