In my case, exactly that, if it were easy (as so many games nowadays, where you just keep on winning without doing much) I wouldn't have played much, but the damn addiction of learning what to do and keep on getting better is quite high in some titles. My closer friends, unfortunately, feel the opposite and if they don't manage to do well in a few minutes, they find it frustrating, think it's a bad title, and will never go back :S