"No mercy, it's the way of the fist" is a quote from the band 5 Finger Death Punch and I can relate to their music, which is why I also chose their band logo - the spiked knuckles. They're definitely my favorite band, so I can careless about when people whine b/s about "band tatts" (save it for someone who cares). My 7th tatt - 2007.
This is my favorite band also. I'm going to get a tattoo with the lyrics "You're the darkest burning star, you're my perfect disease" on my lower back (towards the side) and I might add the brass knuckles in there too.. not sure yet.