Steam Workshop

Which steam workshop games do you own? Which games do you wish used the service?

I own

Counter Strike: Global Offensive
Dota 2
The Elder Scrolls: Skyrim
Garry's Mod
Killing Floor
Left 4 Dead 2
Nuclear Dawn
Red Orchestra 2

But I wish TES: Oblivion used it more than anything. My current method of modding leaves a mess around my computer and half the time I fuck up the files and need to reinstall.