[throwaway26960]

Djent - (Periphery - The Walk) https://www.youtube.com/watch?v=kfPNEGy5L-w

Thrash - (Stone - Get Stoned) https://www.youtube.com/watch?v=yWHlr3U_s8Q

Melodic - (Children of Bodom - Towards Dead End) https://www.youtube.com/watch?v=j7fbeGWZ5gw Also (Galaktikon - Dangertits) https://www.youtube.com/watch?v=eVB8lM-oCSk

Black - (Dimmu Borgir - Progenies of the Great Apokalypse) https://www.youtube.com/watch?v=WuIxl0vip6Q

Heavy - (Smashing Pumpkins - Zero) https://www.youtube.com/watch?v=NBkjcvNztKQ

Progressive - (Between the Buried And Me - White Walls) https://www.youtube.com/watch?v=FNdRh2un5eg

Parody - (Austrian Death Machine - Get To The Choppah) https://www.youtube.com/watch?v=tPIO86jTrQQ

[xtracto]

Good list of examples. I like to point people to Every Noise at Once ( http://everynoise.com/engenremap.html ) to show the differences between the types of Metal.

BTW, it is really really nice to see a post related to this my favourite type of music here in Hacker News. For people that do not understand Metal I can recommend the documentary "Metal, A HeadBanger's journey" ( https://en.wikipedia.org/wiki/Metal:_A_Headbanger's_Journey ) which tries to explain in a "anthropological" way, the background of metal.