In the beginning, I just arbitrarily picked what faction I would use for each character. Titan-NM Hunter-DO Warlock-FWC (though this character has been deleted and restarted a bunch, it always has been FWC) After reading the lore on the factions, I like the diversity in ideas, and I'm looking forward to figuring out more about them (if bungo decides to put more info in about them later). If that happens, it will be interesting if there are different quest lines and activities for their respective factions. One can hope...