When a game is new to me, I set it on 5 balls. It gives me the chance to figure the game out, see what is achievable, and make sure there is absolutely no issues. After some time, it moves back to 3 balls.
My last two I purchased, FH and Airborne, have been set on 5 balls for a while. FH is being moved back down to 3 balls this weekend. Airborne is just too brutal to move back to 3 balls just yet.