IMO Bleach and Naruto do not suck as in trash can. Yes it is a bit childish ( btw the market is teenagers not 20+ ). The only thing I can find wrong with Naruto and Bleach is the filler nature, as in it is way way very very long. Aside from the manga being less fillerish. The actual story have a similar pattern that repeats (aka boring). Naruto gets new skills and wastes all, but isn't as bad as Bleach, where the main character wins battles despite the odds with few exceptions.
Still Naruto and Bleach have a large following. Anime newbies should go see Death Note, thats one of my favorites.
