One of the things that is unique about this game is that when you create your character you don't choose what job/class you are until you level to 10. In the training ground they allow you to try moves of all of the different jobs/classes if you're not quite sure what you're wanting to choose. This was excellent for me because I am usually indecisive at first in all games.
Another thing I like about this game is that everyone's outfit is the same regardless of the armor you wear so that in order for someone to figure out your strategy you would have to tell them or have your equipment available to the public. Not to say you have to look exactly like everyone else because you can change your hair, hair color, outfit color, and your headgear will show up. You can also wear an outfit headgear over your equips to hide your head equips.
You job change in this game so you aren't necessarily stuck with one job and one set of skills
- You have to work very hard to get to the max level twice because you have to reborn into a high novice and start all over again to level up so it will be twice as rewarding
- You have to work with different strategies because if you don't experiment you won't know what works best
- When you get high enough level to do turn in quests (TI's) you will need a party which can be very fun with the right set of people
- They do update the game quite frequently
The graphics I've been told are the same since the game came out
It is harder than most games you have probably played and you may have to make use of IRO wiki and other sites that will assist you through quests, monsters, etc.
The servers are known to lag at times
I will be coming out with a priest guide after I reborn and max her level out so keep posted for it.