Mine was Smack, I was only around 3/4 when it came out but my dad would put FOTL on a loop during car journeys and I would also plead him to listen to track 1 - Smack xD i think I liked the beat and the way you could casually dance to it
I then wasn't interested in music for over 10 years! When I began listening to Prodigy over a year ago, I become obsessed by Smack! xD I have since then become a pretty hardcore, loyal fan but it's funny how I heard the song way back, and I liked it and now, unknowing I'd liked it before, love it now