My Buddie Garry has problems with my old Martin. He claims his fat fingers don't fit. He plays and old wide neck something or other. I have narrow hands and it fits perfect but recently I played my friends old avation from the early 70's. I swear that neck has to be the narrowest thing I ever played. I finger pick and stumbled around quite a bit.   I think it all goes back to finding the guitar that fits your hands, your ears and your budget