I like the fact you can keep horses in stables, then you can have your super fast steed, your reliable but ultimately sh** mule and probably the one you start with.
Also, I hope they add some interesting cheats. Not to complete the game, but to mess about with afterwards - maybe cars, helicopters etc. would be really good. Or if they don't even want to have that sort of tech as cheats, maybe just a huge eagle or something you can fly around on. I wish I was a game designer.