When we stayed at DxL (now POR) in '99, we had a standard view room in Bldg. 24. It was a first floor, corner room nearest the West Depot. We had a parking lot view but the vegetation was so lush that it didn't really matter. This past trip, we requested a King Bed room in the mansions and were given a room in Acadian House looking out onto a "courtyard". I believe it was still a standard view room but we did pay an extra $10/night for the larger bed.
Personally, the "view" doesn't mean a whole lot to me except for AKL. I don't think there are any "bad" views at POR; besides, we don't spend much time sitting in the room looking out the window. However, we did get a comp upgrade to a water view room at POFQ in 2003 and that was pretty nice. We had a second floor room and we could see the river if we stood outside on the walkway. Would we have paid extra for it? Probably not.
As for where to request at POR, Building 14 of the AB is popular and close to everything. Magnolia Terrace in the Magnolia Bend section would also be fairly close to everything. Requests are not guaranteed, however. Building 24 of the AB, where we stayed in '99, is quite a hike to the main building. From our room in Acadian House, it took us (2 adults) about 4-6 minutes to get to the pool and another couple minutes to get to the main building. We were in a room closest to the North Depot and the AB, Building 37. On the map, "C" is the food court, now called the Riverside Mill. (The map is from the old days when the resort was called Dixie Landings.) This is a spread out resort but the walks are really nice, especially in the AB.