Thinking back to the filler, I really didn't mind any of it. I mean, I have not read the manga so maybe I would feel differently about it otherwise but I feel like every bit of filler had its place and was meant to fill gaps and answer questions we may not have known we had. That being said, as far as the anime goes, I consider all of the filler canon because the entire experience of watching it growing up made it enjoyably for me. Sure, the true canon outranks the filler but the filler added nice touches to the story.