It's more than clear to hear exactly where Metallica was influenced with the writing on Kill 'Em All. The first track alone displays riffs and ideas that would inspire Metallica in their early stages. I enjoy every track. “The Mirror” is a precursor to Metallica's first two ballads, “Fade To Black” and “Welcome Home (Sanitarium)”, with that serious and brooding attitude with the composition and singing. I grew to like “The Story So Far”, which I originally saw as “the weak, radio-friendly hard rock song for mainstream appeal”, but those chorus harmonies are great. Essential NWOBHM album imo.