This tune!  This tune made me want to explore the dark, tech-y side of drum & bass.  This tune spawned a seven-year era of my life in music. The twisted synths, techno baseline, percussion and that rave alarm bass drop, all tied into a twisted progressive structure.  This made me want to focus on a sound and it made me want to learn and get better. The fact that this was released in 2001 still blows my mind.