Oh, and while we're at arbitrary style rules, I have one more (with a reason though, to do so). I find this way of indenting "where" really annoying: fun :: Yawn -> Moo a -> Meep a fun y x = do unMoo x blah return it where blah = foo 42 it = blax &&& meee . y it should rather be fun :: Yawn -> Moo a -> Meep a fun y x = do unMoo x blah return it where blah = foo 42 it = blax &&& meee . y Even if the "where" is syntax-highlighted, it is still very hard to parse visually. In a completely unrelated issue, I think this is a very useful way to indent code: foo x y z = case x of Blab a b c -> ... Blib d e f g -> ... _ -> ... It helps avoiding parentheses and reduces line length (especially for longer function names). Compare this with: foo (Blab a b c) y z = ... foo (Blib d e f g) y z = ... foo x y z = ... / Thomas