i wanna a hear some songs that realy describe some genres :
doom metal
black metal
groove metal
melodic death metal
prog death
Doom: Candlemass - Black Stone Wielder
Black: Bathory - Massacre
Groove: Pantera - Mouth For War (I guess?)
Melodic death metal: Dark Tranquillity - Punish My Heaven
NWOBHM: Tank - Heavy Artillery
Prog death: Death - Empty Words

Other regs feel free to tear this apart in the manner you see fit.

My advice would be to check the recommendation thread for some full albums though.

EDIT: ^Exactly.
Quote by rg_metal
I love to utilize furniture to achieve the desired penetration.

I think most genres are too diverse to sum up in one song, you need a few from a range of artists to really get your head around all the different ideas that can appear under that one umbrella term.

here's my vote for Black Metal though http://www.youtube.com/watch?v=3xspdW6GTZo