It's universally acknowledged that most anime fillers suck. In fact, some people hate them so much that they skip whole arcs of long series like Bleach, One Piece, and Naruto. While there's plenty skippable filler out there, people who avoid it entirely might be missing out on some good anime filler.
Yes, it might seem unbelievable, but there's actually some genuinely good anime filler arcs and good anime filler episodes out there. While some studios are just filling time until the next chapter of the manga drops, others use the opportunity to further develop characters, fill plot holes, or just have fun. Vote up the filler episodes you love, and if you skipped some of the episodes on the list, go back and watch them – you'll be glad you did.