It depends, because techno is a slippery beast.
I don't just listen to metal, it's more that I find PJ, NiN, and Tool especially are great for when your needing to concentrate, but want some backing music.
If it's techno, for me it has to either astoundingly good, or be by The Prodigy, Chemical Brothers, Aphex Twin... I've really got no time for club music, we don't need no stinking DJ
. I blame years of making techno crud in soundtrackers in the early 90's - must have had an effect on me
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I think that it depends on age, younger fans might think they have to be loyal, or stick to one genre for whatever reason - I probably thought gangster rap was the only type of music to listen to when I was young, might sound cheesy but IceT's messings with metal and techno did encourage me to check out different music genres. BodyCount rocked though, still worth listening to even if it does sound a bit dated these days.