- Achievement System:
If there isn't one already, an Achivement System would be great.
Here is a simple example of one, "Slay 100 Wolves in 10 minutes - Reward (Title):
Also the time you Slayed the wolves in would be recorded online, if somebody beats your recorded time, you will lose your title and it will be given to that player.
Another Achievement Suggestion I have is for each Achievement you earn you would also earn Points.
For an example, lets use the above mentioned Achievement. For that Achievement, you could earn 10 Points and with each Point you could purchase 0.1% increased movement/attack speed, so if you had to spend all 10 of your points on 0.1% increased movement/attack speed you would have 1% increased movement/attack speed. With more points, you could purchase better statistics like increase health, damage or armor.
- Arena:
A PvP system where teams could fight in an Arena, much like the Arena in The Elder Scrolls IV: Oblivion where you fought against another team. You would also be able to become the Arena Champion, which could be awarded as a Title and you would get an Unique Item and Arena insignia.
- Unique Items:
Unique Items - pretty obvious where I'm heading - are items that are extremely rare and only one of it exists. These could be obtained by completing certain quests, achieving diffcult achievements or looting a certain NPC. These items would also be able to be dropped in PvP and looted by another player, enemy or ally.