1. 9Dragons.
This is a great game with a very unique and interesting skill system. Also the diversity of races (clans) and classes makes a very good game.

2. Atlantica Online
It's just so unique and I love the turn based system.

3. Dynasty Warriors Online
Massive Hack 'n Slash is just win.

4. Dragonica (Dragon Saga)
You gotta love some hack 'n slash whenever you're bored.

5. Battle of the Immortals
With a lot of daily events, fast leveling and a great story-line makes it a great try-before-you-die game.

6. Metin2
This game has a very close community and nobody is ever too lazy to help you out.

7. Dream Of Mirror Online
Provides endless fun with a nearly infinite amount of combinations of classes and equipment.

8. Runescape
Simply by far the best browser game out there. Perfect for people with low-spec computers.

9. Perfect World
It's a simply beautiful game with great graphics, skills, a lot of instances and a massive world map.

10. 12Sky2
This is a very nice game heavily based on PvP at higher levels. The Battlegrounds also make a great add-on.