1. Naruto
This has a very good plot and AWESOME fight scenes. It has that emotion piece, too, that I love. Though, SO MANY FILLERS! Other then fillers, I enjoy it a lot. The plot is well structured, and the fight scenes are epic.
2. Fairy Tail
This anime has cool fight scenes, humor, and graphics, but it's missing a well structured plot. As
@Chopper said, it's pretty not well structured. It basically is arc, fillers, arc, REPEAT.
Ummm... Fairy Tail and Naruto are the only amines I've watched a lot on, but since I've watched a bit of One Piece, I'll go with that as my third.
3. One Piece
I haven't watched much, but man, it's good. It's plot is awesome, it's full of comedy, the fight scenes are sick, and its pretty good xD. I'm gonna watch more once caught up with Fairy Tail and finish half of Naruto. But, my favorite part of this anime is the plot. Very well structured.