Yes, indeed, the gear I use alters my musical preferences. It has really widened up new landscapes for me. I find that when the sounds themselves are presented in a good way, more music appeals to me; it's like "that drum has a fabulous sound", or "I love the way that triangle in the background just shines".. I used to be way more genre-bound. Contemporary free jazz e.g. has finally gotten to me.
The E9 is the best amp I've yet heard - please read that carefully because I'm not saying it's the 'best' at all - just that I haven't yet been able to sample anything better. So I wonder if I have any idea what my HD650s are even capable of. And yet, I LOVE what I've heard so far. Yet, with my DICE Tube amp near field (am I using that term correctly?) iPod dock set, the sound is....richer...like a syrupy liquid - and yet also not muddled or artificial. I suspect the DICE isn't even all that...but I'm looking for richness, clarity AND engagement from my DAC/Amp/Headphone chain. Again, NOT to replicate a speaker set-up, but to find in headphones their own charms in richness, clarity/space, and engagement without fatigue.
Brief aside - has anyone here had their headphone listening warp their musical preferences? I used to love electronic music with samples and mashups - but the problem is you're really listening to a recording of a recording...whereas with a well-recorded (or even just adequately recorded) analogue or acoustic piece of music, there's more depth when the clarity of your listening device gets better. It's making my electronic music sound flashy but flat.