Manowar basically looks like a bunch of guys who would sing about He-Man swords'n'sorcery bullshit, but what about artists who you'd expect to completely look different from how they sound?

Big Black sounds like a buzzsaw looking to rip your head off... but they look like a bunch of AV nerds:
https://files.nyu.edu/alr237/public/bigblack_mohnstad1.jpg

Would you also believe that this is one of the loudest bands ever?:
http://userserve-ak.last.fm/serve/_/95662271/My+Bloody+Valentine.png