So what were your favorite space NESes, and why?
Swirly Lights Yonder, by Bil.
It was simple, elegant, and we developed some very amazing species. There were a lot of cool interactions between us, and Bil was a fun, creative mod. I had a very fun relationship with Daftpanzer in that NES.
I also enjoyed
GalaxyNES: No Horizons, although that was something that I modded myself, so I'm biased. Sadly, it had a fairly small player base, but I could rely on Thlayli, NK, Lucky and erez87 to be regular contributors. Lucky's civilizations underwent a huge amount of development and ended up getting dragged into basically every catastrophic conflict to afflict known space, NK developed a really cool civilization based off of the idea of a fundamentally different kinship system, erez87 developed a very interesting race of celestial supervillains, and towards the end Thlayli was turning his multi-species Collectivity into a grand alliance to take down the Zan Hegemony. Lots of other players played smaller roles, but the NES had a major problem of people joining, adding some complexity to the world, and then leaving, which left me with a lot of NPC-dominated regions. Still, I had a great time with it, and I'd like to revisit it some day.
Shoutout to Daftpanzer's current project,
To the Great Beyond - Space Empires!, which shows a lot of promise!
EDIT: And honourable mention to SKILORD's
Picking up the Pieces, set in the aftermath of a failed alien invasion of the earth: humanity's nations were largely destroyed, but so too was the bulk of the invading migrant fleet, leaving all of its formerly enslaved races to try to set up new homes on Earth. I played a group called Omicron Wing, aliens of the Tourliski species, who the invading aliens had used as pilots. They are delicate, diaphanous hovering organisms, native to a planet with very low gravity, so being stuck flattened to the ground on the high-pressure, high-gravity planet of Earth is a uniquely intolerable hell for them.