You might want to find the thread with the BLT room views. IMO the MK view are more like you are looking toward the MK. Fences, back stage stuff, the roof of space mountain, not really a great view IMO.
If you want a chance of seeing the Magic Kingdom, request an even-numbered room in the North tower. When we booked a standard view, that's where we were, on a low floor, and we could see the fireworks from our balcony. For our Lake View reservation, we had an odd numbered in the center tower, and it was a beautiful view of the lake.