Personally it comes down to the skill of the GM for me, just like with any sort of RP with a group of people I suppose. I've had some very good times in other MMO's with some amazing and creative GM's who were masters at big group events. And on the flip side I've had terribly boring encounters where nothing is really there to spark the imagination. I actually do a lot of RP with friends through email, Skype, AIM, and forums as well as ingame. I guess you could file me under that group of people who just loves to write and I'll happily take it anyway i can. 
