Yeah.....with Naruto I knew that filler was filler, which I'm sure gave me a biased opinion in itself, but there's no denying that the best filler is never better than the worst manga arc.

Like with One Piece, for example, I never knew what was filler and what wasn't...but what I did know was that I absolutely hated that dragon arc (didn't find out until sometime later that it was indeed filler)