Usualy played in drop D (a guitar tunning acheived by by loosening the low E until it is a D) as the name would sugest, but can be played in any drop tunning.
Most riffs will consist of 2 to 4 bars of beefy low end crunch, followed by a quick Dime squeel. Lyrics will either be growled or sang in a wingy moany fashion similar to crying. Drummer will usualy play with a double bass pedal and a chineese ride symbol.
Common characteristics include: Not being able to tell riffs apart from each other, not being able to tell songs apart from each other, not being able to tell bands apart from each other.
Classic metaler: "No".
Dickhead in boiler suit: "Why not?"
Classic metaler: "coz it's all drop D dickhead music".
Dickhead in boiler suit:(begins to winge like a bitch)