They may have started out on the heavy metal side but got softer and softer in the 80's and 90's. Once they took off their black & white make-up, platform boots & studded black leather, they started wearing lipstick, eyeliner, rouse, teased hair high enough any southern girl would have been envious of. GLAM rock.
A heavy metal band would never be caught dead wearing pastels or bright, day-glo colors. Watch the video for "Tears are falling". Sorry boys they evolved from heavy metal to hair band. Not saying they have bad music, I like them.
Hair band pictures below, 2 bands for reference.