hmmn, ok i'm not sure if i miss the point here but i'll try anyways the biggest argument or unpopular opinion i have with people around me is most of the time about perception and rating of music in general. To give some context i'm usually branded as some doom-metal hardrock dude with also a knack for weird noise glitchcore drone-ambient whatever stuff. maybe rightfully so as this might make up for a slight majority of my music-library. now people around me are all very much into very "true" and "real" music, like totally deep indie and super obscure electro and oh so dreamy post-hardcore aswell as the obvious trve metal, maybe for good measure even the occasional jazz or classical stuff thrown in to seem intelligent, without ever having actually listened to it. the thing now is those all pretty much accept each other in a "i guess that's cool" kind of way, but for some reason as soon as Pop is involved everybody get super defensive, as if they'd feel their sexuality threatened. when i for example show some of them some K-Pop which i happen to really dig (some of it), i don't even get a response at all. it's just raised eyebrows and maybe awkward laughter as to how supposedly riddiculous this is supposed to be.
now not liking whatever kind of music is totally fine, but you have to have some proper reason for it and explain to me for example why on the one hand jamiroquai is like the tightest shit to have come to the music world in years, but shinee or big bang on the other hand aren't even taken seriously.
this is usually when the argument about authenticity and "they don't even write their own music" and all that shit starts, which in terms of bigbang would even be false, and also is totally irrelevant to the music itself, i mean i don't hate on anthony hopkins for not write silence of the lambs himself now do i? then there's always a ton of other equally irrelevant arguments (only for teenage girls blabla, no real instruments blabla, gay blablabla) and all the other shit, which, and this is the point, the persons themselves actually don't really care about i believe.
for some weird and really unfortunate reason the progress romantically described as "developing ones taste" is just a long way of narrowing down ones horizon and the more narrow minded you are, the cooler you are seen by your friends. at some point you believe that shit even yourself and even tiny variations from that narrow road are enough to deem something shit or mainstream and sellout and whatnot.
it is an easy error to make, for myself if i am about to dislike something i always first try to ask myself why that is, and if that supposed reason is actually valid. a lot of the so called "guilty pleasures" should be enough of an indicator for hippocritical judgement .
people always shake their heads and tell me they find it weird that i (the "doom-metaller") think mariya carey's can't live or seals kiss from a rose is one of the coolest songs ever, I on the other hand find it weird that given the extremely limited space we have with what's considered music (12 semitones, more or less all in 4/4, more or less all consisting of drums-bass-keys/synth/guitars-vocals) force ourselves to like only even a fraction of that and even dictate that by outer influences like appearances and other connotations... hmmn... i guess i went totally off rails here, didn't i? regarding the Dir En Grey arguments here, probably agreeing with the general consensus of them still sounding deep-fried in VK, which is why i always find the "they sound like any other western Deathmetal/Metalcore Band now, SELLOUTS!" argument so utterly stupid...