ok i have been playing guitar a LOOOOONNNGGG time and i have to tell ya the only 3 things to worry about are:
Pickups:
Demarzio for metalish
Anything else for everything else
The action:
LOWWWW action (strings closer to the guitar) for metalish stuff
Higher action (strings further away from the guitar) for everything else (adjust to liking shops usually do this for like 10 bucks or buy your own truss rod adjuster kit and attempt to fu... i mean fix up your guitar)
A body that YOU feel confortable with:
Dont pick the extravagant metal type guitars you see... those are for stage show off only and they are really uncomfortable.
Explorer bodys are comfortable Sg's are comfortable.
DO NOT i repeat DO NOT get a les paul body unless you buy an actual les paul....
anyways it really doesnt matter what "Kind" you get as long as the pickups and action are good and you like the way the body feels....
dont be mislead by:
"Buy this its made of better wood"
"Buy this its famous"
"buy this it hasmore knobs than that one"
Just buy what you think is comfortable
Music is music is music is music........