In no particular order, my favorite factions on the server would be the Colonial Remnant, Reapers of Sirius, the Buccaneers, Phantoms, Benitez, and the Keepers. They're there either because they're awesome to meet ingame, their RP has a lot of depth and direction, spreading and evolving through the months and years, or both. Those are the ones that I think are absolutely awesome and should be emperors of the world or something.
The Buccaneers aren't that old here, but it seems to me like they have a lot of potential and are planning to use it well.
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<span style="color:#000000">All morons hate it when you call them a moron.
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