I don't mind being left in the dark, minus the basics, which we have. We know how the game's premise goes and starts, we got a feel for the combat and the other mechanics, what else do I need without delving too deep down the rabbit hole?
Personally, I don't like it when a game just spills all the details on you. Peter Molyneaux was infamous for that, and a lot of his clout turned out to not really be what we were getting. It's like, you know you're going to get that present on your birthday, and you've gotten some hints to what it might be, and that generates excitement. But if you know too much about what is inside that present, it diminishes the joy of finding out for yourself.