What's heavy considered? Fast, Slow, Deep... What's your opinion?

Hey everyone! I'm new to Ultimate Metal. I'm here to discuss what I love most! Metal! Also to promote my band The Reign, The Guillotine. What do you consider as heavy? How about fast tremolo riffs with blasting and fast double bass? What about thrash riffs and drumming? Or just really slow chugging or breakdowns? Perhaps just really low tuned guitars and distortion, what is the element of the metal you listen to that gives you that sense of "HEAVY"