I've played for a while now and while I love the game the social interactions in the game seem to really be limited. I've been trying to pinpoint the problem with it and the difficulty in expanding your social friendships for a while. I believe it comes down to a visibility issue.
The only time you interact with players outside your group is in town. Instancing provides a pretty significant wall of separation from everyone else in the game. The difficulty I'm having, which I've discussed with the few people I do play with in-game, is that I don't have any real social interactivity with people in the game because I have no context about them. I can start a group for a mission, for example, but the action is fast paced, and people really don't get to know each other doing the missions. So you run the mission then most of the time people go their own way afterward.
Unfortunately I don't have any suggestions. In games like Everquest, Dark Age of Camelot, etc. the social interactions are dictated by the gameplay. In order to succeed in those games, you need to group. There isn't the concept of adding NPC henchmen to your group, so you have to find people to play with. The gameplay is slow enough that you end up forging friendships with people over time because you get to know their gaming styles, personalities, and skill levels. The social interaction is stemmed from needing to play with other players.
I really enjoy having the henchmen capability in the game, but I'm finding the lack of a good social climate to be stifling because people (including myself) can just take a whole slew of henchmen out and do their thing solo. Without specific "friend" channels, guild alliances with shared chats, and things like that, it makes it really hard to expand your friends base too far out.
My guild has 7 people in it. These are 7 people I've been gaming with for years, and we're all good gamers. However, when my guildmates aren't online, it's frustrating and difficult to forge new friendships and alliances with people. This is a problem I've never had in any other online game I've ever played.
Is anyone else having these issues? Or am I out in left field somewhere?
L

I think the slight feeling of "privacy" would encourage more people to chat in the game. And if they start wanting proper privacy, they can group or use whispers. It'd be cool to wander around town and see what people are talking about and stuff too