Few suggestions :
K-ON was cute and all but I found Hibike is better on the music side and less boring over all.
If you like KLK, you are gonna love Gurren Laggan. Same over the top spirit.
Monogatari is fucking great and I have not found better of the same kind. If you know something please share :)
As for One Piece, I would recommend FMA brotherhood. It a fairly popular choice but it's not overrated.
Few suggestions :
K-ON was cute and all but I found Hibike is better on the music side and less boring over all.
If you like KLK, you are gonna love Gurren Laggan. Same over the top spirit.
Monogatari is fucking great and I have not found better of the same kind. If you know something please share :)
As for One Piece, I would recommend FMA brotherhood. It a fairly popular choice but it's not overrated.