There are similar threads on the official forums (I haven't been getting involved on reddit) - however, the official forums are also a lot quieter than they were a year or so ago. There's just... not as much to discuss, really.
What I miss seeing is things like "show us your collections", "show us your titles", "funniest thing someone said in game", "how's the game treating you today?". You know, all those fun little threads people used to post regularly in. There's nothing to talk about when there's nothing that's fun, exciting, mystical, etc. I don't know, I just don't think GW2 is a lot to talk about.