I hate to stereotype, generalise and assume because yeah, yeah bigotry, pretentious nonsense, don't like, don't listen to it, you do better. Yeah, yeah, yeah, yeah, yeah. Whatever. Sod it, let's all go nuts. Keep it friendly!
Ok, so MODERN Heavy Metal bands, there's 2 sides of it, 2 sides of the coin if you want to be really, really basic.
You got your bands which fit under labels like Metalcore, Deathcore (I wanna be brootalz hardcore death metal emo), and there's also the many areas of Death Metal which I'll just not go too deep into but you get the point.
On the other side of the spectrum you got your neo classical, keyboard heavy, dragon fairytale, dungeon siege Power Metal stuff. Right, If I go too deep into this I'll just end up being bias straight away so I'll leave it all at this.
Compare this to the olds, the NWOBHM, The Big 4, Classic Rock, Prog and just think and ask yourself this;
Do you like the direction of which metal music is going in this age?
EDIT: There's also a 3rd movement, the most vulgar, unoriginal and boring of them all. The core genres. Metalcore/Deathcore which is like the designer kid, scene kid, pop metal stuff like Bring Me The Horizon, Bullet For My Valentine, Trivium, Machine Head and Killswitch Engage.