If ever there was a pointless argument it is metal fans arguing over which metal sub genre is the best. Everyone will support their favourite sub genres no matter what.
Personally, I like Metalcore, Hardcore, Progressive, Nu-Metal, Rapcore, Mainstream Rock, Alternative Rock and have just started getting into electronicore after hearing Enter Shikari and Crossfaith. There are bands I love in these sub genres and bands I dislike.
I also love Aussie Rock, Parkway Drive, Amity Affliction, The Butterfly Effect (with clint boge as the singer, will have to wait and see how they go with a new singer), Thousand Needles in Red (Clint Boge's new band), Electric Horse (former Sunk Loto singer) Even old Birds of Tokyo stuff.