Someone else: he's a metal head!
Kevin the Metalhead: Listens to mainstream, modern metal, such as Slipknot and Avenged Sevenfold. Is often discriminated against by other metalheads for liking that music, and doesn't seem to know the difference between metal and emo.
John the metalhead: 35 years old, with a family. He listened to metal as a kid, and while his hair might not be as long as it used to be, and he dresses more "average," he still loves to listen to bands like Judas Priest and Megadeth.
Then there's Jake the metalhead. Jake thinks that ALL metal is awesome, and listens to Heavy Metal, Thrash Metal, Power Metal, Death Metal, Melodic Death Metal, Groove metal, Black Metal, metalcore, and Nu-metal. He likes basically any kind of metal he can get his hand on, and rejects no genre of metal. He listens to Iron Maiden, Sabaton, Judas Priest, Slayer, Amon Amarth, All That Remains, Black Sabbath, Hammerfall, Emperor, Megadeth, Venom, Iced Earth, Slipknot, Testament, Morbid Angel, Exodus, Lamb of God, Mastodon, Rush, Cannibal Corpse, White Zombie, and any other band that makes the beautiful sound known as metal.
A metalhead belongs to a subcluture which consists of metal music, dressing up metal like studs, spikes, leather or black clothes & band shirts in general. They often attend countless metal shows with all their metal buddies. Nothing wrong with it.
But metalheads divide in two, one side has the intelligent and the other the stupid. The first side usually had good grades at school, they never abused alcohol and are generally very educated, smart and intelligent people who just happen to like heavier music.
The other side however has people who nearly dropped out of school, drink alcohol more than anything else, swear, are violent and lack of brains.
Often these two sides of one subculture clash with eachother, making metal subcluture one of the most notorious and controversial of them all.
Metalheads also tend to be elitist towards the music they don't listen, EVEN inside their own subculture. check example 1
Not all metal listeners are metalheads. They do enjoy heavier music to a great extent, but they choose not to dress according the subculture and are very open to all music. They do attend metal shows, but every gig that comes to the country isn't a metal must. Those people aren't metalheads, they're metal listeners. check example 2
Metalhead 2: I don't get black metal, it doesn't have any melody, it's just noise!
Metalhead 3: Shut the fuck up you two, both are just fine!
Metalhead 1&2: No YOU shut up, there's only ONE true metal genre!
2 Mary listens to the most evil metal music there is, but has only attended three shows in her entire life. She also loves to wear pretty high heels and lots of white (or any color that isn't black). She doesn't have many metalhead friends, she'd rather go shopping for new purses while listening Gorgoroth via her headphones. She's not a metalhead but metal listener.
Someone who is open minded and respects other people's tastes in music, because they realize that their music isn't everyone's cup of tea.
2. An arrogant, elitist hypocrite who believes that his or her tastes in music is better than yours.
Someone who will criticize bands they don't like for doing things you'll see their chosen bands doing all the time (which they will conveniently ignore.)
Someone who complains about pop music and how bands such as Linkin Park are corrupting the metal industry.
Someone who mentions how much they hate Lady Gaga on a youtube video that has nothing to do with her to begin with.
Someone who constantly argues with the "no true scottsman" logical fallacy by saying that metal bands they don't like simply aren't metal (even though they are somehow corrupting the metal industry, see Linkin Park again.)
Someone who wants to tell you what to wear, how to act and what religion you should follow, while simultaneously accusing "mainstream" audiences of doing the exact same thing.
A homophobe that will call you a fag if you like music that he or she doesn't.
Type two metalhead: You shouldn't listen to Linkin Park because they're not real metal. They're corrupting the metal industry with their shitty emo music. You can only listen to bands like Nightwish and Lacuna Coil. Everything else sucks. Besides, I think you're only listening to pop music because other people are telling you to. You're such a gay emo f**!!! Go DIE!!!