Maybe this topic is not about telling me what kind of metal subgenres I listen to, but I saw some people did, and I'll do the same...
My first favorite metal subgenre is Metalcore, many metalheads don't consider metalcore a metal subgenre, but I do, since many of them scream and growl a lot. It also depends on what metalcore you listen, there are bands influenced more from hardcore punk than metal, I don't listen to them, I prefer metalcore influenced more by metal itself. Some bands I like: August Burns Red, The Devil Wears Prada, As I Lay Dying, All That Remains, Killswitch Engage etc.
I'm also a lot into Death Metal, the heaviest metal genre out there. I listen to original death metal bands like Cannibal Corpse, Aborted and Death, but I also listen to Melodic Death Metal bands like Arch Enemy, Children Of Bodom, Amon Amarth etc. I don't like Technical Death Metal very much, except the band called Cryptopsy.
Another subgenre that I like is Thrash Metal. I like the heavy thrash metal only though, only where the scream and/or growl. Bands like Slayer, Exodus and Anthrax would explain what I'm talking about.
Groove Metal is kinda down in the list, I don't listen to a lot of groove metal, but sometimes I do, so I have to keep it in here. Bands that I like most in groove metal are Lamb Of God and Pantera.
Final favorite sugbenre is Nu Metal. I like this genre just because Slipknot is part of it. Actually I don't know any other nu metal band except KoRn, but I dislike them a lot.
There are many other subgenres I did not mention in my post, because I don't really listen to them. There is: Black Metal, Power Metal, Speed Metal, Alternative Metal, Industrial Metal, Avant-Garde Metal, Extreme Metal, Deathcore, Glam Metal, Heavy Metal etc.