Well, first I have to admit that I did forget Industrial metal. Pretty stupid, considering I was listening to Rammstein at the time...
To Crushed Hope: You're probably right about Power Metal, but I tend to think of that as just slightly newer heavy metal.
As for the rest of your genres, I can see where you got them, but they're really too over-specific. A lot of them are really just ways of trying to fit a band into a genre. For example, say a band that isn't quite heavy and isn't quite death. You could just acept that it lies in between, but a lot of people have a tendancy to come up with a a bizzare new genre, like 'Deavthy Metal'. Then someone crosses that with industrial, so you get 'Indeavthial' or something... It's really just too complex and, from a musical point of view, really quite limiting.

Quote Originally Posted by Alive-Man
Well Nu metal IS rap metal, for the guy who made this thread. Nu metal consists of funky metal guitar riffs and shouted/rapped lyrics, so those two genres are the same thing
Not really- Rap-Metal is more like rap with a metal element, while Nu Metal is the other way round- metal with rap influences.