Only for those who want a really Hard Challenge look, for those who want things easy, look elsewhere.
But lets put the things for someone who has play it for 6 years now and explain the things straight up.
First get used to the characters, there are Tanks, Damage Dealers, Magic Dealers, Supports, Archers and Summoners, every character has their own play style and skills and you must learn how to used them and what they do because if you don't learn that fast you will be dying a lot and in the end having a really hard time in this awesome game that everything that needs is patience.
If you pay attention to the map, your lvl, skills and class, economy you will see how lineeage 2 works, as a stiff challenge that the one who dedicates more time in it will be rewarded and be completely happy of his or her achievement.
During your play time you will meet other people and this when you will realize one of the most fun parts of this game and is the Party system. There are places you will not be able to go alone and you have to go with other people and you will gain fiendship and at last this people will always help or go Party with you and this is how when you reach lvl 55 or over will be an easier time (trust me, on 55 you can play alone but is way to hard).
the other stuff that relate great to the game are the Castle Sieges, Clan Wars, Raid Bossing, going to a Boss (example: Antharas, Valakas, Baium) and if your character reaches his or her maximum lvl the game is not over as you can do a quest and subclass and continue and try a completely new character and after going all the way up to maximum lvl with your subclass you can became a hero and go to the olympiad stadium and prove yourself to ither characters in a tournament with the best players in the game.
Lineage 2 is a game that will reward in time, and when that time comes you will be saying "Finally I have what I been playing for" and can be a lvl a weapon or armor or just make your own goals in the game and make them happen you will see that you will be happy in the end.
Lineage 2 is the best MMORPG out there regardless of what everyone says, is shiny, has the best equipment and armor, has the best pvp system,.....in other words it has all you want in a MMORPG, come on give it a shot but if you wants things easy go play WoW, this game is not for a 9 year old or younger.