I've been playing Guild Wars 2 since the pre-purchaser headstart which was about a day or so before the official launch.
This is one of the best games ever made. It is an MMORPG for enjoyers of MMORPG's and also for people who absolutely despise MMORPG's it caters a little more to the despise group though so if you're a super hard core EVE, WoW or Everquest player this may not hit all bases for you but it will hit most of them.
If you ever enjoyed those console platformers like Jak & Daxter or Ratchet & Clank then you will enjoy this game and if you enjoyed WoW for the scenic vistas, interaction with other players etc then you will like it.
There are so many great things to describe about this game that it is just hard to pick one. They spent 5 years on this game and it shows. It is very well polished the artistic style not just in the environment but the user interface, the way stories and cutscenes are told. It's all very well thought out and implemented.
The questing system is a lot different to what you may think of in an MMORPG. In a traditional MMO you will go to an NPC and speak to him then he will give you one or more quests which you can choose to complete or not and afterwards you will usually need to go back to that same NPC to pick up your reward.
This is where Guild Wars 2 changes the equasion. Now instead of having various quest givers with various quests in each zone they use dynamic events and hearts to deal with XP distribution. So instead of going to an NPC and getting a quest you would travel near a heart and instantly an objective appears on your screen, you didn't need to speak to anybody.
Most objectives (Delivered through Hearts) have more than one thing (usually 2-3 things) that you can choose to do to complete that objective. For example if you're helping someone protect their farm you could do that in a number of different ways such as fixing defenses, killing intruders, reviving downed NPC's, putting out fires, disabling mines. And each one of these things can all be done at once to complete that one quest. It's varied to keep you entertained if you get bored killing mobs to complete that quest just go do something else to complete it.
Dynamic Events are separate to Hearts and as the name suggests they happen dynamically and regardless of if you're around or not. So lets say you're out doing a heart quest and then ping on your screen you see a hoard of centaur are attacking a nearby town. It says "New event nearby!" now you can go to that area on your map where undoubtably other players will be fighting already and you can join in just by running up and playing or you can continue to do your quest. Sometimes if an event is in the same area as your heart quest you can even complete both quests just by doing one objective because the two overlap.
Now the reason I've mentioned these parts of the game is because I feel these are the main things that define Guild Wars 2 as different to the current MMORPG's out there. These are the things that appeal to people who hate the MMORPG formula. This game is just so much fun. I really can't recommend it enough.
To quote my friend who absolutely hates MMORPG's and swore he would never play one "Guild Wars 2 is the best game I've ever played."
I'll save at least 30-40 GB just from avoiding Windows 7 alone.
