Well then here's something that requires no patience at all:
Flotilla.
This is a space fleet combat game, but unique in that it is turn based and also because it's probably the first genuinely 3D game I have encountered. It's tiny, about 50meg, and is really probably a proof-of-concept demonstration in the hopes that someone will take it on for a proper big budget production. But it works well enough for an entertaining pastime as is.
The 3D element is very good. It is turn based, so you give ships orders as to where to move in 3D, which way to face, and which target to treat as priority. The turn is then executed and they move and fire for 30 seconds as ordered. Ships have weaker armour on the bottom and rear, and thus maneouvering for position is very important. Most projectile attacks striking heavy armour won't do any damage at all, but simply be deflected.
The net result is very different from your standard space battle sim to date, which has mostly been about massing as much firepower and hit points as you can and slugging it out on a flat plane. Games like Homeworld brought some innovation and complexity, but this is the first I've seen to make 3D movement and tactics really critical to success. Inferior forces really can defeat superior ones with smart tactics, and the vertical dimension is not merely nominal, as it so often is.