I love classic rock, but am not really a fan of Heavy metal music.  I once went to a Motley Crue concert just to win over a guy.  Ugh!
I love heavy metal.  Since it combines blues music with acid rock, I consider even Van Halen to be heavy metal due to  the massive sound, distortion, guitar solos, and overall loudness.
Well, then maybe I like Heavy metal, because I like Van Halen.  What is acid rock?
Acid rock
Acid rock is a loosely defined type of rock music that evolved out of the mid-1960s garage punk movement and helped launch the psychedelic subculture. The style is generally defined by heavy, distorted guitars, lyrics with drug references, and long improvised jams. Its distinctions from other genres can be tenuous, as much of the style overlaps with '60s punk, proto-metal, and early heavy, blues-based hard rock.
The term, which derives its name from lysergic acid diethylamide (LSD),
documentary "Ramones: The True Story" that he improved his downstroke style by playing the song over and over again for the bulk of his early career. Recording engineer Ed Stasium once stated "Johnny makes it sound simple, but I can't do it, and I bet Eddie Van Halen can't. Not for an hour!". This technique was also very influential on new wave of British heavy metal bands such as Iron Maiden. His style has also been an influence on many alternative rock bands, as well