Originally posted by onyx2006Nf6 merly delays deciding ones defense while developing the knight and preventing white from playing e4. It's only downside is it allows white to play 2. Bg5 which I personally don't find very challenging, but some people do...
yup, i usually open with d4, Nf6 is the toughest challenge- IMO.
Edit: there is nothing wrong with 1. d4 d5 and in fact is a good way to learn.