I taught 'Big, open & flat'. I'd rather my student spend more attention to making the field than dithering over the minutae of selection considerations. In the brief I'd expand 'big, open, flat' to cover slope, surface and the other usual details but in the limited time available in the air then there are more important priorities.
A less than perfect field with the approach & landing flown well is better than a botched approach that crashes into obstacles next to a 4000m runway.