Personally, I find myself looking at mercury, Venus and Ganymede the most out of the set , you just don't see them imaged that nicely that often! When are the rest of the Galilean moons making an appearance?
Russ, I have images of a lot more moons including Io, Callisto, Europa for Jupiter. Titan, Rhea, Tethys, Enceladus for Saturn. Two moons for Uranus (can't recall the names).