1. Protoss = Dis: sitting back and letting their robots do the work, mysterious and old empire, possibly past their prime but who knows if they will awaken... Don't give a fuck about anyone else for the most part.
2. Zerg Swarm = AD & pals: huge numbers, try to assimilate new people quite a bit, make hissing and grunting noises instead of speaking like normal humans, very brutal.
3. Terran = LO & Ainran: mainly ex-cons using jury-rigged or stolen equipment, caught by surprise by 2. & seem on the back foot now, and will maybe be semi-allied with 1. at some point...