Today Post Frame structures and or Barndominiums as they are called are built for there beauty and comfort of the owners. They are less expensive to build than a traditional stick frame building, but you are able to have all the extra amenities found in a traditional building.
A post frame structure allows for a wide open floor plan, not limited to a load bearing wall. Another advantage is energy efficiency because walls end up thicker, having more insulation and less air gaps. Post frame structures of the past have been stereotyped as appropriate only for the farm, which is no longer the case.
There are endless options - soffit overhangs, cupolas, shutters, awnings, porches, a variety of window styles and door panel options and colors - available to "dress up a building". The exterior of a building can also include steel wainscoting, brick, or stone that dramatically changes the entire look of the structure. So you can build your building and create any type of use you need, living quarters, shop, garage, horses areas only you imagination is the limit to how the building can be designed.