One think I'd find valuable is descriptions of your "Aha!" moments, when you grasped a particular aspect of Haskell. (Although maybe this doesn't belong in an introduction, or maybe it does, especially a cross-language one). I got one from the lazy fibonacci snail in the Haskell98 Tutorial
So you get aha-s with various aspects, then you get them again at a higher-level when you discover how laziness, currying, statelessness and higher-order types all play together. Individually, the features are not that interesting, but together they're mind altering.