I personally prefer underground and borderline music(or nonmainstream music if you will) because those bands have real originality compared to mainstream bands. mainstream music usually sucks because they all sound the same. plus the very nature of mainstream entertainment is trends. I'm normally a hard rock/heavy metal guy, but I am open for all kinds of music except for bubblegum pop and some country music. other than rock and metal, I am a fan of dance music like techno, trance, progressive, etc. and even though mainstream music usually sucks, there are some mainstream music that's actually okay in small doses like foster the people and bruno mars. speaking of bruno mars, I dig his music because he has a retro style music. if you listen to his song treasure, you can easily hear that the song reminisce 70s soul music. now that's something innovated right there. this is what mainstream music should sound like instead of sounding like the same thing like miley cirus and the jonas brothers(Barf!). the 80s has the best music. lots of innovated music existed back then. speaking of 80s music, I've discovered a new style of retrowave music on youtube a few years ago and I thought this is really innovated. this kind of music sounds like it was made in the 80s, when it's actually from 2010. here's some clips of some of that music. in my opinion, this is what today's music should sound like.
Overdrive by lazerhawk
So electric by lifelike
Ocean drive by miami nights 1984