The core of Guild Wars was built for competitive PVP. All over the world, we have PVP arenas, some are just for training, some are for tournament, Guild vs Guild wars, Alliance vs Alliance, Hero Battles, and the ultimate battle Hero’s Ascent. From these wars, fights, players and guilds, can obtain rank, recognition, and loot, and also Arena Net holds nice PVP contests, with real prizes, like the July $100,000 Tournament Series. 

In Guild Wars we get to choose from several professions: Warrior, Elementalist, Monk, Dervish, Ranger, Mesmer, Necromancer, Paragon, Ritualist, or Assassin, each with its own strengths and characteristics, a weapon or magic specialty, and a unique set of skills with which to deal damage, manipulate the enemy or environment, or protect and heal allies. Each profession provides a set of attributes which determines the effectiveness of weapons and skills in battle. 

You can customize your avatar by choosing from multiples faces, hair styles, (around 10-20 each profession) which is good, because you are really able to make a character to look like what you like, and not be like in some games just a clone. From here you choose to make a roleplay character which will start a lvl 1, and you will be able to go through the storyline, quests, which are great, or PVP character of lvl 20(max) ready to get in Arenas and fight. 

Because of the instanced approach, the PVE system, content is one of the best we saw so far. The world sometimes changes because of your actions which is great, the quests are very well done, not all are just courier, and most of them have a nice story, and they are present in a nice way, when you go side by side in a adventure with a NPC, because that is the quest, and fight side by side with him, learn his story, and so on. They are tons of quests with decent rewards, on each continent, and besides this we have the cooperative missions, that are the main storyline, where you need to go with a party to complete them, and I got to say they are great.

Each character has around 200-300 skills to use in their fights, but only 8 of them can be used in a adventure, once you  are in a town, outpost, you can change, add, remove the skill you have available. Also each character can choose a second profession, and to use that profession skills, imagine a Warrior/Monk, that fights well, but also can heal, and cast enchant or holy spells over the enemies and allies. (this is my mainJ)