I have compiled a list of what I consider the 12 "best" moons, I would be interested to see if you agree or would have a different list. Funny how half of them belong to Saturn! I didn't include the Moon because it is just a big source of light pollution
Europa - the ice is pretty cool, the best
Titan - wow, that atmosphere, "I love the smell of methane in the morning"
Iapetus - even though I am not a Collingwood suporter
Enceladus - gott love those stripes
Io - who doesn't love pizza
Hyperion - a moon that looks like a sponge, OMG
Triton - love those ol' geysers
Phoebe - so tiny, yet it created it's own ring
Prometheus - someone has to keep the rings in order
Ganymede - you have to love the big guy
Miranda - she took a battering, but she still came out round
Phobos - the Russians like it enough to go there
Pity you can't see any detail on these from here.