To be honest I'm okay with fillers as long as they are good, if they feature interesting characters and a promising plot I will end up watching them.
I really liked the first three arcs of Shippuden, but really hated both Stories of Konoha and Adventues in the Sea arcs. In fact, I stopped watching the anime for a long time twice because of them, I tried to watch both arcs but they were so awful I couldn't continue. Recently, the Seven Swordsmen episodes and the Chikara arc managed to get my attention back.