- A long-term Traveller game: I've only become interested in class SF fairly recently, and it'd be a lot of fun to do a sandbox type Traveller game. I actually managed to start a game like this, and I think it was going well, but then I had to stop gaming on account of the impending arrival of twins.
- A low-magic fantasy game. I'm not sure D&D would be the right system for this, but I'd love to run a game that is very close to medieval Europe, but with magic and horror lurking in the shadows. I've sketched out many setting elements and ideas for this type of game over the years, but never managed to actually run one.
- A World of Darkness game: I love the World of Darkness games (at least the old WoD games; never played the new ones), and I haven't played one of them in years. I'd love to remedy that. A while back I ran an mash-up of Mage, Unknown Armies, and a bit of Kult for some friends, it was a hell of a lot of fun. But that was years ago. I miss being steeped in that setting.
- Something set in ancient Rome. That's why I find Cthulhu Invictus so interesting, although Rome could be a great setting for lots of types of campaigns.
I could easily expand that list.