A free online role playing game I recommend is Atlantis ultima (http://www.atlantis-ultima.co)
1- The best game system (skill sheet & other) I’ve encountered in a turn-based MMORPG.
2- Very varied (7 races available from dwarves to orcs, possibility to have an axe or a machinegun, to be a magician, warrior, merchant, or polyvalent, …)
3- Emphasis is placed on interaction between players.
4- Non-addictive or time-consuming. One tour a day, so no people staying connected 24 hours a day to become the most powerful.
5- No zombies: Almost all players are active (80% have logged in once in the last 24 hours…)
6- A team of developers is putting the package together to improve the game even more.
I’ve been playing it for 4 years and I’ve never been disappointed!