No offense here but i'll post my true opinions around Naruto, Bleach, Dragon Ball and One Piece because i've seen that a lot of people like those.
Note that this post has mild spoilers.
Naruto, here is what happens in every episode, first of all, the first episodes were about Naruto being a noob in the school and shit, which was boring. Later, they go to training a forest and a villain appears, 100 episodes later, the villain is gone, they celebrate and a new villain appears and naruto goes all "I TRUST MY FRIENDS AND LOVE THEM YOURE GOING DOWN BECAUSE YOU DONT" and all that, repeat that and you have an anime called Naruto. Not to mention from a couple episodes i've watched, they spend like a whole episode staring at the villain thinking about what to do.
Bleach, to be honest i haven't watched it, but from seeing a couple episodes and from people, it appears it has nothing special.
One Piece, i mean c'mon, it's not even a good anime at all, a guy who wanted to become a pirate, alright, so far so good, a couple episodes later, a villain appears. the main guy who i forgot his name (I think it was Suji or something.. i honestly forgot.) appears and saves the situation with his spongy arms, a couple episodes of shit happening (aka filler) and a NEW villain appears, read this paragraph 91910291 and you have an anime called One Piece.
As for Dragon Ball, i don't even have to say anything.
Anyway, as for my favorite anime, it has to be Claymore, while i find Inuyasha pretty interesting, it's kinda the same as Naruto but much much MUCH more mature, i didn't watch it all, though.