This is a size comparison between the 24 biggest moons of Uranus (bigger than 20km in diameter)
Uranus's moons are my 2nd favourite group of moons. Miranda does have high cliffs and historical activity, but Titaniamight have a briny underwater ocean and is the biggest moon which makes me more fascinated on this moon.
This is a size comparison between the 15 biggest moons of Jupiter (bigger than 20km in diameter)
Jupiter's moons are my 3rd favourite group of moons.
Most people would be interested on the moon Europa because of its likely subsurface ocean hundreds of kilometres tall. NASA launched the Europa Clipper on October 2024 and will arrive on April 2030. In my opinion, Ganymede is my favourite moon because of its magnetic field due to its iron-rich core. It also might have a subsurface ocean.
This is a size comparison between the 16 moons of Neptune (I accidentally got the scale wrong and made 1440px 4,728.2 km)
Neptune's moons are fascinating but don't fascinate me as much. In my opinion, the best moon of Neptune would be Triton because of its chaotic history. It is theorised that Neptune captured Triton when it was a dwarf planet. Scientists justify this because of Triton's similar composition to Pluto and its inclined, retrograde orbit. Proteus isn't a major moon, but it's my 2nd favourite moon of Neptune due to its box-like shape.