I got to feel that we were going offtopic. Sovereign, make them exactly how YOU want to. If any of us feel strongly enough about any of this, we are completely free to try to make our own. For the record, I was just taking part in the discussion, hence feeling offtopic.
However, since interest has been shown by the topic starter, I will just throw my two cents in.
Riker wasn't posing to Cochrane. He was genuinely caught off guard by the appearance of the moon. I know it's somewhat inconsistent with the appearance of the moon in other episodes, but to suggest that these features are underground and not noticeable completely belies the nature of Riker's comment.
The cadet girl on the valiant mentioned atmosphere domes, if I'm not mistaken. I'd put a bit of infrastructure and surface buildings around the domes in broken concentric rings, but nothing so noticeable that a casual glance would draw the eye instantly. Silver, grey and blue glints, mostly. Tycho City obviously fills the crater Tycho, New Berlin is up to you, as is lake Armstrong, perhaps a large crater in the Sea Of Tranquility. I'd put them all on the Earth-facing side (who doesn't want to see Earth?), and perhaps a tiny observatory or station on the far side.
I love the concept of a low-grav lake. Imagine the waves!
