I'd say Skyrim is looking most promising.

I had issues with Oblivion, but it was massively fun, and I've had issues with every game I've ever played. Looks like they're steering Skyrim in a good direction… though frankly, I'm trying to avoid the hype-machine as much as possible. I only read the excerpts and summaries here, and rarely go to the commercial sites and read the full marketing articles.