I've gone back to playing DAOC on Phoenix, a new free server. I keep coming back to DAOC, with it's outdated graphics, clunky characters, and 2001 animations.
I think i've keyed in on why I like the DAOC format that was similar to a lot of games in that era and not so much today. They seem to have found the right balance between encouraging you to group up and you actually have fun grinding mobs or hunting in rvr in a group. While at the same time, you're not forced to. In fact, if that's not your bag, you can roll some VERY effective solo classes for rvr purposes.
It rewards coordination in a group. Not just grouping for the sake of it and bursting through something assuming everyone can keep up with you. That seems to be the mechanic now, you group up, but you're not "really" a group. You're just doing your solo skill without much talk or planning at all.
Or other games that remove the need to group at all, where you go the entire game as an RPG without the MMO.
Then there's the other swing of the pendulum, where the game is very very painful unless you have the perfect group...all the time.
Hats off to old DAOC for getting that balance close to perfect.