I'm fairly eclectic when it comes to most things, including music and cars. People rip themselves off when they don't give different experiences a fair chance. Having said that, I'm not so fast to label them closed-minded, as I've seen those with minds so open their brain falls out. And sometimes, you just don't like something, and it has nothing to do with you being unwilling to expose yourself to something new. I really want to like Jazz, but no matter how many artists I listen to, perhaps 1% I find palatable. The part of my brain that needs to be wired a particular way to fully enjoy that genre just isn't structured that way. It's not from lack of exposure or unwillingness to give it a chance, I just don't like the sound.
I love rock, both old and new, hard and soft. I like pop, rap, baroque, classical, r&b, hip-hop, blues, country, and a limited selection of new age. I even like Gregorian Chant.
But techno, at least in its purest form, and its offspring, house and trance, I really can't stand. The one use of techno I do like is when it's used to remake old classic rock/pop songs. Threw a party once playing all techno remixes of rock classics. People loved it. The main problem is 99+% of the DJ's doing these remixes are complete hacks and the end result is awful. But once in a while you come across a DJ who really has a gift for remixing, and the old songs he recreates are fresh again, and danceable.
Check out
Dirty Funker for some of the music I'm referring to. They have some outstanding remixes. On that site you can listen to full, high bitrate samples of their songs for free. Listen to their remix of Welcome to the Jungle and Smells Like Teen Spirit. Do it on a computer attached to a decent sound system. They really did a top notch job. And this is coming from someone who LOVES Rock and HATES Techno.
Warp Brothers also did a remix of Smells Like Teen Spirit for Ministry of Sound. First time I heard it was at the MoS in Hurghada, Egypt. Crowd exploded when it played. Listen to it
here.