I dislike it when 12year olds are looking the same as adults
This. I used to love DNAngel. thought it was top stuff...when I was about 10/11 about 8 years ago. I re-read it a few years ago and realised 'wait a minute...I'm really expected to believe that a bunch of 12/13/14 year-olds are running around and doing all this?'
This was also what I disliked most about Gungrave. Big Daddy and Maria's daughter, Mika, is only 12, I think. But she's made to look and act around 16 at least. Her being 13 just made her seem like a whiny brat (granted her parents were killed >.>...but you know what I mean. And I realise the anime was adapted from a game so it's not the anime creator's fault).