My first playthrough of Endless Space is going well! After curbstomping the Sowers and assimilating all of their planets, everyone is suddenly very keen to make peace with the United Empire. Basically, I'm playing as this galaxy's villain
To be honest, warfare is long and very tedious in this game, so I'm glad that once your empire is large enough, you can stop playing aggressively and concentrate on maximising production and research instead.