someone who has just finished season 4 and looking for season 5 onwards i feel its simple but so are most of the top rated onces. compare it with say bleach or with naruto or dragonball and varients story plays out very simmilarly.

I watched entire bleach and still remember it for the awesome OST.
I watched naruto till a point and remember it for 1-2 sound track and may be some fun stuff, but primarily coz of naruto's obsession to bring back sasuke.
I am watching fairy tail now liking music and ya like you said its fun to watch. Fights do pump you up, which is something i felt was missing in most of naruto fights.

But then my experiance is only of these 3 plus dragonball and dragonballz so who am i to comment.