[quote name='xgsjx' timestamp='1377530405' post='2188514']
I'd probably define Metal in the general sense as any music in the vein of Hard Rock, Grunge, Glam, NuMetal, Metalcore etc. So bands from Nirvana & Pearl Jam through to Slipknot & Wolfmother. Anything that has 2 or more guitars with a decent amount of dirt on them all.
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That's a sweeping generalisation, completely discarding rock as a genre.
Replying to OP: by the description given on wikipedia: http://en.m.wikipedia.org/wiki/Pop_music
"generally short-to-medium length songs, written in a basic format (often the verse-chorus structure), as well as the common employment of repeated choruses, melodic tunes, and catchy hooks"
Yes, most metal fits the Pop Music tag.
What a shame so many people grab this opportunity to knock a genre that can be so challenging and diverse. I get the feeling many of the haters couln't play a convincing metal gig to save their life.
Ah well, I'm probably too protective of my trade