I realised that L2 is a rather shelfish game than WoW or at least in WoW u do things together with other ppl cause u can't do em alone.
In L2 u have special Raid Bosses but only the powerfull clans do em and it's on every leader's decision if he will give u some unique items or not(depends on what u provide for the clan)
Most ppl try to equip better themselves for being better in pvp trying to get high lvl buffers for pvp, try to reach the highest lvl for pvp.
As a matter of fact L2 started as a pvp game not like WoW for doing quests and staff. The main part of the game is PVP not to get along with ppl and make parties and do things together.