Professions
Choice of profession will of course have a huge impact on how the game plays. There are eight professions in Guild Wars 2. Each of these professions is roughly categorized by the type of armor they wear: scholars wear light armor, adventurers wear medium armor, and soldiers wear heavy armor.
When designing the professions it was very important to ArenaNet to make each of them feel as unique and different as possible. In addition to weapon, armor and skill choice, they've developed a number of cool profession mechanics for each one. Again, they will be revealing 1 last profession on the Guild Wars 2 main website.
It's very important that professions in an MMO have interesting ways to interact with each other. In the past this has mostly been limited to healing and buffing teammates and managing aggro in combat. They wanted to expand considerably upon the types of teamwork available to the players. With this in mind, they've implemented a system of cross-profession combinations.
A warrior and an elementalist playing together could combine their abilities in several different ways. The elementalist could drop down Static Field, which is an area-targeted lightning effect. A warrior who fires a rifle bullet through the static field would cause his shot to be charged up with electricity, inflicting additional damage. If that didn't suit their style, then the elementalist might drop a Wall of Fire in front of a group of enemies. The warrior could enter the firewall and use Cyclone Axe, an attack which causes him to spin rapidly, sending the firewall outward and hitting his foes. There are literally HUNDREDS of combinations for players to discover.
ELEMENTALIST
RANGER
THEIF
GUARDIAN
NECROMANCER
WARRIOR
ENGINEER
There is one profession left, yet to be unveiled. COMING SOON!!!
Attributes
-Power: Increased attack damage.
-Precision: Increased critical strike chance.
-Vitality: Increased health.
-Toughness: Increased defense/armor.
These are the most recent changes to attributes... they could change again before release. However, if this happens, I'll keep you updated. ;)