I tend to enjoy music at louder levels too...and my SD has a decent older system in it... Or perhaps it's just because I'm deaf after being a drummer for 20+ years!
...But for most of those rump-shaker car stereo guys, it has NOTHING to do with actual sound quality and enjoyment of the music.
As ridiculous as it sounds, it's a "status" statement... It's about ego and perception... "getting noticed"... getting "one-up" on the next guy who "only" has a 50,000-watt, 24-speaker, 10-amplifier system. Nothing more.
NO style of music sounds good with THAT much bass overpowering everything else.
Mike