It's an interesting thought. For years, I've been put of by anime, not just because of the constant overflowed with Teenagers, Moe, or repetition of character tropes and story ideas. If feels like anime being made are by people who really don't know how people act. I looks at the portray of characters from K-On and compare it to teenage girls from something like Digrase or even something like Tangled or Spectacular Spider-Man, I feel like I'm watching real characters, not card-board cut-outs of what people think girls act like, being cute and silly and nice. They feel more like little kids than anything.
It also seem that since the various companies and creators are Otaku's themselves, they think they know what fans want and give that to them, rather than making something what they want to make. You look at Samurai Shamploo, FLCL, Trigun, Fullmetal Alchemist, these where shows that were clearly made because the artists wanted to make something like nothing else. You even look at DBZ and how Akira Toriyama was inspired by Walt Disney's 101 Dalmatians, You can tell that he made it because he wanted to. Now, look at the anime today, the Fairy Tail, Sword Art Online, and the rise of Incest animes, these didn't have that same creative spirit, but feel more like a check list of what an anime should have, almost like if it was focus tested.
I'm not saying these shows should go away, but it be nice to see anime grow out of this trend and start growing up, look at how real people act, and tell stories with characters, rather than nonexistent guesses of why they are.