It's the mindset that metal music gives you, you think it's badass, you think it's hardcore, you think it's the best shit to ever happen.
Panda gave me a nice story that almost anyone whose listened to metal goes through.
You find Metallica or Slayer or one of the big 4. You become hooked on said bands for a while before you decided to branch out a bit into death metal or metalcore or black metal. You become hooked on that genre for a bit until you find progressive metal, this is where your attitude towards music changes, you start to look for song writing and technicality or something like that and find electronic music or post-rock. Then you're pretty much matured musically and you start to find stuff you REALLY like.
I've noticed that style of progression is common. It may not be exactly like that, but most people go through it.
Edited:
Me? I found post-rock and moved straight back into post-metal, although I'm trying to go through trip-hop and trance music right now.
I still listen to and like the metal stuff I listened to 3 years ago, just not as frequently.
pretty much this