I think my favorite filler episode of One Piece so far is the Johnny and Yosaku meet Zoro one. Zoro is so...cutely oblivious and deadly at the same time and the animators made it so that you can practically SEE them calculating about their odds on going with him or not. Zoro's so damnably naive and they're just so goofy that the three of them are just...damn adorable. And oddly smexy, even with Johnny's scary pink mohawk.