THe problem is, you're basing this ENTIRELY around the idea that 'good' is based around popularity, not around anything else.
Is doing drugs good? it's popular, it's fun, it gives you a kick, but no, it isn't good.
Is driving cars really fast good? no, but it's popular, fun, exciting.
Is the stuff sung about in a majority of rap good? shooting up homies, brothers killin' each other n shit? no, but the theme is popular, exciting.
Take note, that a majority of "popular" things are mindless self indulgence, some of social benefits, some do not, but all in all they are stupid things to do.
There is nothing wrong with a casual glance at it or even liking it fairly a lot, but I think what most of /a/ actually hates about the popular shit is the retarded morons that come with it.
Weeaboos, lamebrains who can't talk about anything else "man do you watch Naruto?" "do you like Sasuke?" "Sasuke is so cool" "Naruto is cool too but he is lame" "Sakura is so kawaii~ ^.^" etc.. etc..
Now in this case, what is popular, is FUCKING ANNOYING due to the demography it tends to pull along with it.
I like Geass, I like Naruto (the manga at least), I like Bleach, I like all that shit. But I don't obsess over it, I watch it for mindless entertainment when i'm in the mood for it and I don't go preaching shit is a masterpiece when it clearly isn't.