Profile

Universes

Emoticons (game related) for Lobby and Forum

System/Star based Curiosities/anomalies

Mods should not disable achievements.

Better Customization Options

Make Academy spawn an isolated system (no links)

Interbreeding

Ground Builder

Population Management Menu

space monsters to fight and maybe tame

show shot down missiles in advanced battle debriefing section

bring back the flee-counter strategy

systems you don't have full ownership over shouldn't add to overcolonization penalty