I'm still waiting for OpenMW. I'd love to go back and play it, but dealing with all the issues of the ancient Gamebyro engine is not something I want to go through again. Hopefully the guys behind it finish up before TES 6 is released.

Obilvion is great but I don't like the setting of Cyrodiil too much. Skyrim has the 'latest TES engine' and largest mod library to boot, although it does have issues, being a mostly incomplete game and its stripping down of mechanics. It's why I mostly dick around in it or have mods to patch that hole up. I'm glad to see someone else with appreciation for Morrowind though.