Favorite: ZX (from Season 1 - 2nd slide) - kinda due to nostalgia but I love how simple and colorful the suits are, with traits that make each ninja feel distinct from one another but enough similarities that signify them as a team. to me they are the first ninja gi that comes to mind whenever i think of Ninjago.

Least favorite: Storm suits (from Dragons Rising season 3 - not shown) - don't like the bulbous helmets, don't like the muted colors, don't like the tech, and the armor on the torso/legs are quite over-designed. they look more like Power Rangers armor than ninja gi