I feel like when Blink-182 were peak popularity around the turn of the century, they brought with them incredibly low hanging guitars. I think they're also giants and so it appeared even lower. But punk and it's offshoots tended to do the low guitar thing.

And so for me, when I was in a band as a kid, I sacrificed comfort and some of my ability to play to look cool. The number one rule of combat (and life) is: Always Look Cool.

They do it because it looks cool. And their playing suffers because if it.

When playing seated, I rest the guitar on my right leg, neck slightly up. Standing, or my favorite, reclining, I prefer to have the guitar nearly vertical kind of like a cello.