I don't have a lot of MMO experience, but this is generally what I like to see in games in general. Don't make NPC interactions a chore. Try to make them interesting. Make players be excited to turn in quests, and have players feel like they know the NPC. You don't have to sacrifice story for gameplay or vice versa. Good immersion means the player needs to feel like they are part of the world and that they know what's going on. Good, responsive, and natural feeling controls are a huge part of that. Interact with the community. This means beta tests, newsletters, in-game activities. (My PC isn't exactly the best, so I'd love if the system requirements weren't too high. If you need them to be, don't worry about it, I'm just offering advice) [b]Finally, what I feel to be the most important[/b] Do not add gameplay features just to add them. If you think an idea is cool, great, just make sure that 1. There is a reason they are in there and 2. There is a reason for players to use them. This was one of my problems with recent Assassin's Creed titles. They gave you a lot of options, yes, but none of them mattered enough for a player to use them. Most, I'm sure, never used the rope trap. Most players probably just used sword, pistol, and blade. Try to have most things (because let's face it, no one is perfect) in there for a reason. Think Chekhov's Gun. Good luck!