Compared to the rest of the Animal Crossing series, I like how I can be the Mayor in this one. I kinda wish there was more to it, as far as I can tell it mainly just means that I can start public work projects, but ah well. I think it's easier to make money in this game, and I'm pretty sure that the house can be expanded more than previously (I think, I forget how much previous houses could be expanded). There's other stuff they added too, but I named some of the more notable things.
@Joltik; Who are your favorite units in Awakening? For usefulness and in general.