Which part of Fairy Tail will bạn change if bạn have the ability to?

Every single filler arc, cuz that's suck.

As a big NaLu người hâm mộ and a Gray Fullbuster hater, I have to say when Natsu and Gray save Lucy when she falls after Minerva beat the living hell out of her (Lucy almost died). Only Natsu should have saved her