I put all my machines (acade/video) on the way they were intended to be played. 3 balls for modern pins.
Part of it is just the mentality of the player and that varries widely. Williams system 11 games, like Taxi, can be VERY short. Personally, I tend to like the challenge of the brutality. It makes me want to play MORE. Other people get frustrated when things are too hard and they just quit.