Well, two things really. I'd always been a huge fan of '70s progressive/experimental rock, which influenced modern electronic music in a huge way. The electronic experiments of "Kraut Rock" and Industrial music made me aware of electronic techniques in music, but it was really the film "Pi" and its soundtrack that made me conscious of IDM and modern experimental electronic music. So I've really only been into it as a seperate genre for 5 years, but have been listening to its influences and related forms for much longer...
