many reasons for me.
First, techno just flat out scratches a very deep and primal itch that nothing else can except great sex
Second, it's diversity. Good hard poundin techno is like Slayer without the evil because evil is bad right? Detroit Techno isvery soulful and beautiful and minimal techno to me is almost meditative and intelectual.
Third, it scares wankers, well the pounding variety does anyway.
And lastly its about as diametrically opposed to a Robbie Williams or a Black Eyed Peas song as any music can be.
Peace and long live techno.