I'll pick on Haskell since that's the one I've used and like. Sometimes you get the feeling that people go overboard with the type system, I've passed over potentially better libraries for ones that are a bit more redneck friendly. The next annoyance is operator explosion. Ran into one that was a constructor in Happs. Hoogle and Google were useless. Eventually grep won the day. The final issue I have is that sometimes the type in the standard libraries aren't quite what you want. Fortunately they seem to be fixing this.