Whoopedy-freaking-doo, you and HOW many else?
Alright, that's maybe a bit harsh, but seriously, I doubt anyone cares a whole lot about someone else's music tastes, at least on these very intelligent and nice forums. Of course, there are exceptions, but it's like...you're a gamer, cool, that's all we need to know, we generally don't care if you listen to the god of war soundtrack on repeat exactly 17.5 hours a day or have no interest in music whatsoever. Say one bad thing about Tengen Toppa Gurren Lagann or Firefly, though, and you WILL get flamed (just a fair warning/headsup), but generally, people here ain't culture snobs ('cept when it comes to anime...). Besides, most people here has such diverse tastes your "mainstream" tastes probably ain't all that special.
Myself, I listen to whatever the fuck I like, not "mainstream" or "obscure" or "indie" things. I may tend to like metal and rock and punk over things like The Killers (they have one good song in my eyes, and that's somebody told me) or 50 Cent, but that won't stop me giving them a listen if I think it might be good. I have just had the necessary experience to know it's not appealing to me. I admit to skimming through your post, since it's near midnight here, but I see you seem to think in the same way as me, or at least slightly so. You lament the lack of a general message in mainstream music, but think about it: these days we're already bombarded with messages and information from everywhere, what makes you think people necessarily want to spend a whole day dissecting every single song from every single artist? Some people just want a funky beat and/or something that appeals to their sense of estetics instead of their ethics. /lame pseudo-philosophical pun. Oh, and although I don't want to sound too harsh, I will say: get over yourself, you're not the only one and not a special case. Lots of people here like mainstream music from what I gather, although there's a lot of obscure-stuff-lovers here as well. I'm sorry, but I just get the same vibe from this OP that I get from girl gamers that go and make threads like "I'm a girl gamer, ain't that just awesome? I'm so cool and rare, bow down and worship me, for I am unique."
PS: Sorry if I make no sense whatsoever.
PSS: Sorry for sounding like (and being) an ass