A great deal of metal is prima facie ugly, and I find that most of the people attracted to this aesthetic have emotional issues, abuse drugs, or self-harm, etc. I enjoy hanging out with some of these people, but it's an observation I can't ignore.

As you point out, there are a number of subcultures, some of which are generally wholesome and aesthetically sound. For example, Manowar fans are usually intelligent, driven, and extremely muscular.