Although I haven't been playing this game for long, I can say for sure that the most exciting and memorable moments happened late at night in the beginner channel. Everyone talking there was around my level—we chatted casually, joked around, and shared questions about the game.
However, once I aged out of beginner status, I often felt a sense of regret. We were left with only the Global channel or faction chat. Speaking up casually in Global felt like putting a target on my back. Everyone is left praying they become a faction favorite; otherwise, it gets very lonely.
I hope the developers can add more communication channels based on player levels or stats. That way, players can still make friends beyond their own factions. :)