I played Guild Wars I to death, so I am very much looking forward to Guild Wars II, my hall of monuments awaits.
Another MMO I am looking forward to is Cryptic's Neverwinter Nights, I loved the Forgotten Realms setting ever since I played Icewind Dale. Unfortunately they have not been too forthcoming with development as of late so their is not too much to get excited by at the moment.
How about an MMO based on Perry the Playpus? Players create their own animal agent and are assigned a nemisis. Cryptic's engine would be perfect for this and they could have it up and running in as little as a year?
If they could make a MMO with the detail of SKYRIM, that would be huge in my book. Letting you pick your path, and pretty much doing what you want to a point, and with that level of detail I mean wow. That would be a great MMO. hehe
The various servers could correspond to different calendars, so you could insert yourself into whichever story/era you wanted. There'd probably even be a server which was a fusion of every era.
You'd start out as a basic soldier in training for the faction of your choice, and you could choose whether to be infantry (FPS-Style), a Mobile Suit Pilot (more traditional MMO-style combat), or a crewmember on a Warship. Warship crewman would provide even more options, such as Mechanic (keeping the warship and its Mobile Suits in tip-top shape), Combat Operator (passing orders from the Captain to the Mobile Suit Pilots), Helmsman (driving the ship), Gunnery Officer (Using the Warship's guns to attack targets Arcade Style), Ship's Doctor (treating the injuries the crew sustains during combat), Quartermaster (buying and selling items, keeping your ship well stocked with supplies), or even Captain (passing orders to your crew, making crew assignments, planning out battle strategies).
And with MS Pilots, you'd start out in a basic Grunt Suit, and work your way up to better and better Grunt Suits, until you either get to customize your Mobile Suit or become a Gundam Pilot.
Now, the G Gundam Server would be different, because that was a completely different type of plot from the rest of the franchise. You'd select your home colony, and whether you want to be a Gundam Fighter or Support Crew. Support Crew would be a combination Mechanic/Quartermaster/Doctor for the Gundam Fighter, who would be similar to other MS Pilots aside from three major differences: You start out with your own customizable Gundam, Gundam Fights are gladiatorial, 1-on-1 matchups, and the moves a Gundam Fighter can use are more... flashy than the abilities MS Pilots can use in other servers.
Anyway, that's the kind of MMO I would really like to play.
When it comes and it will come eventually. Problem with Fallout being an MMO, is the sheer size of the task the developers would have. It would need four years development, no less. If they create it within 3 years on an existing, very suitable engine, possible I think but I doubt it.
Guilds would expect their own vault.
Vaults would need to be customisable. That is like STO fleets wanting fleet bases, a big project on its own.
your char classes could be something along the lines of
and off course 00's
Q Branch (someone to make all the cool stuff we all use LOL)
your races would be diffrent nationalities, British, American, Russian, Chinese ect...
you could have missions where Russian agents actually work to stop the other side with out being pvp. maybe each side gets a mission and the team that does it the best superceeds the other teams victory.
Dynamic world where the missions can effect the future of the political relationships of the countries.
PvP matches of course.
Real World locations. Car chases in Tokyo, Boat chases in Venice, Plane chases over the amazon.
Moonraker missions to orbit. Spinning AMC Javalin jumps in Thialand. Flying cars LOL