I personally would love if we did away with packs! And instead had items that could be purchased or collections of them. Kind of like Wizards101 does. Where hey this hat is on sale this month. OR you can save up points from in game achievements or something. I think Maxis would make a lot more money with that kind of concept...but meh what do I know!
OK I vote farm animals and farm pack all the way! Travel to many different worlds! And yes Supernatural with a twist would be good.