I've been avoiding watching "One Peice" cause of its no. Of episodes but i just made up my mind & started watching it out of Boredome.

"One Peice" is good though I don't know if i should watch "fillers" too. I usually skips fillers in other animes but should i skip it in one piece?

Is fillers worth watching in "One Peice" ?
Are they important for main story ?