Despite it's outward "immaturity" as some would like to pigeonhole it as, a deeper sift into Black Metal reveals some well educated and extremely articulated musicians.
Black Metal to me utilises far more intelligence and research for its topics, albeit, a colder kind of approach to music than other subtypes of metal.
Why do I love it so much?
It addresses many spiritual, religious and sometimes political issues. It is a art for statement, a serious voice for serious topics. It is not about fun, or fucking cool riffs, it is about vocal interpretation of thought and aural interpretation of thought. In a world where free speech is becoming more suppressed every day, I'm finding Black Metal to be one of the few vehicles for honesty left. It continues to stick the middle finger up at this increasingly shackled society we live in.
I even find it's pretentious nature justified because it helps to retain the philosophical and idealogical core of the movement. Yes, it does have a somewhat strict sense of guidelines, but I don't think these restrict it's ability to expand into more experimental territories, be they musical, religious or philosophical.
Now, perhaps I may sound overly pretentious, but I can't put it any other way. Black Metal is music for the intelligent metal enthusiast. It is something which correlates to ones own personal beliefs, it is not for all.
Consider how many people laugh at Black Metal's characteristics: to me, it is because they belong to the mass herd, they are unable to conceive a high political/religious/spiritual awareness. That is their loss. The same may be correlated to older, more serious types of music such as religious mass.
Black Metal, like religious mass and older forms of "strict" music succeed powerfully in their objective because of their primary positive trait: devotion.