For me (Napa) has been my home since 98'. Sure the population isn't as big as it was, but it still has a solid group of players that are friendly and helpful.
Atlantic, on the other hand is basically the Walmart of shards. Great for shopping but otherwise full of people I'd rather not hang around with. Spend 5 minutes on their gen chat for a glaring example of this.
I'll stick with my quiet shard, thanks.