Are you a DVC member or are you renting points from a DVC member? If not, no need to be concerned about Preferred or Standard. Guests who book the BWV via CRO/WDWTC are assigned ROH - Run of the House. There is only one category for CRO cash reservationa for the BWV. Your room could end up anywhere.
FWIW, the rooms overlooking the Boardwalk are reserved for DVC members (or their guests/renters) who are paying for their stay with points. It is a specific room category and must be booked when the reservation is made. Boardwalk view rooms are no longer available by request.
If you are staying on points:
Preferred view - Pool/Garden rooms overlook one of the pools or the canal. Most also have a view of the Swan/Dolphin resorts (across the canal). This category makes up about 60% of the available rooms.
Preferred view - Boardwalk view rooms overlook the Boardwalk and Crescent Lake. As already mentioned, this is a separate booking category. It is very popular and often only available to those DVC members who reserve 11 months prior to check out. All of the rooms in this category have a view of the higher level fireworks from IllumiNations from the balcony. This category makes up about 20% of the rooms.
Standard view room overlook the front entrance and the driveway leading up to it. There is quite a bit of landscaping/flowers between the BWVs and the black topped areas. Some of these rooms have a view of the higher level fireworks from IllumiNations from the balcony. As already mentioned, these rooms are very popular with DVC members and tend to book up very quickly after the 11 month reservation window opens. This category also makes up about 20% of the available rooms.
FWIW, virtually all of the guests who book via CRO/WDWTC for cash end up assigned to a room in the PV - Pool/Garden category.
Best wishes -