In Ryzom there are no classes to choose. Develop all the skills of your character harmoniously or choose to concentrate on one skill and become a master. You are not forced to choose a faction when you create your character. Join a faction during your journeys, or not.
You don't have to fight in PvP, but you can. Join a guild whenever you are ready for it and build up alliances, or just start your adventures alone or with your friends.
Search for the most valuable materials on Atys to create your own unique equipment with which it is easier to defend yourself against your enemies. Hunt the mightiest bosses on Atys. Conquer an outpost and drill materials for your guild.
Do your own thing or make an impact on the politics. Develop your character in the way you want to and start your own story.