loose.. but not too loose.. i know a kid that tightens the front truck and keeps the back loose.. and another kid who takes off the washers to make his trucks that much looser..
tight trucks tend make you break boards a lot bcoz it won't absorb harsh landing,loose trucks though might tend to become unstable when you need a higher pop with a lot of speed and wheelbite..I think just put it in the Mid settings for all around