Okie i hope you know pick-ups are in the first place...
Your les paul naturally has 2 pick-ups, and the each pick-up is controlled by a volume and a tone knob. so if your math hasnt failed you, that totals to 4.
Ya, I don't usually touch my knobs either, just sometimes roll off the volume to get a bluesy mild overdrive sound when my distortion is on and I'm too lazy to turn it off
i usually turn down the treble vol to get a bassier tone.. heh.
anyway why do i hardly see metal bands using les pauls? which band guitarist uses les paul