You're in trouble. I hope you don't have a job or a girlfriend.
Surely it can't be worse then World of Warcraft...
If you don't mind them playing fighting games. Lots of sword play/archery/magic and killing have to be done. My 11 year old daughter plays it and enjoys it, but gets frustrated at times by the difficulty for an 11 year old. It's definitely better than many games out there.my 10 year old just asked me if he could get skyrim.....is it appropriate for 10 y/o??