Yeesh, and I thought I had thin skin.
*sigh*

Look, people have different tastes in things, be it music, TV, art, comics, whatever. Just because someone has different taste than you doesn't mean they suck. If someone likes band X, which you dislike, and they also happen to dislike a bunch of other bands you deem shit? That doesn't mean that their taste sucks, or that Band X sucks by association. Sometimes people actually do like things that are all around bad, and sometimes they like things despite having flaws.

When someone tries to point out that hey, people disagree with your taste too? The thing to do is not get defensive and claim they are attacking your taste; that does indicate how you are a dispassionate judge of what is and is not good. Either shut up and quietly seethe because you think your taste is infallible, or admit that it's not. Taste is entirely subjective and the case in point wasn't even one of those bands where they're off key half the time, or a manga where someone's leg mysteriously ends up with three joints and curved bones.

Oh, also? When you get super defensive, don't assume that the person "attacking" your favorite whatever would act the same way if they were in your position. Some of us have our favorite things criticized relentlessly, by people we like and seek out voluntarily, and we don't have a shit fit.