Also give people decisions that they normally wouldn't find in games for example in one of the kessen games i use to love before each battle there was a strategy phase where you could pick an advisers suggestion, ie my chief strtegist may suggest a fire attack or lurring them into a canyon and dropping rocks on them, where as my chief general may suggest a shield wall.
Also a game mechanic suggestion could be a freemode in which the map is randomized, and all races start with a single city and expand out.
Finally Make sure the princesses have dynamic characters and personalites, and that war isn't the only way to win, and that you don't have to be either good or bad. which in my opinion is where fable screwed up.
Suggestions are welcome, but there's another topic for that
