when my kids were teenagers, i felt the best place for our master bedroom was 'along the path' from the exterior door to their bedrooms.... so we'd know when they were coming or going.

aside from that, how far away is far? will future buyers of your house tend to have small children and want/need to be closer, but the master isnt within the sound of someone throwing up?

Check with your Realtor. In my area, a stack plan (that's what we call them here) has a much longer period for resale as most buyers, here, prefer a split plan. Having said that, if this is your long term home, then it doesn't matter. Do what works for you and your family.

Having a master on the same level as the kids bedrooms, but on the other side of the house is usually the best compromise. It makes future buyers with young children feel that they're not too far away, but future buyers with older kids won't feel like they're too close.