The best One Piece filler arc and the One Piece arc that I most revisit (it’s only 11 episodes, can you blame me?), G-8 is a One Piece Greatest Hits collection and possibly the first thing you should show someone if they want to get into One Piece but don’t have long to do so.
The Baratie arc is the first hint that we’ll get about how hectic the One Piece world is.
I like to think of Little East Blue as a celebration of pre time skip One Piece, where the Straw Hats get (deservedly) celebrated for a bit.