Im 21 and i dont feel that im that old to watch anime. I guess the reason people associate anime as somewhat childish is for the fact that its animated. Most people associate cartoons (even though anime may not be considered as cartoons) with children and what not. On the other hand, games like Black Ops and Madden have a more adultish feel to it thus being criticized less. But that is only how i see things. It doesnt matter what others think, just do what you like to do. imo, its as simple as that.