I don't use landing boards either, but then I don't even use bottom boards. My bees either fly into the hive from under the hive stand, the vast majority, or use the upper entrance/air vent. The most popular entrance from the bees point of view that I've seen is just an entrance place between the 2 brood boxes. make a 3 sided shim, leaving the 4th side open, to the front, and they will come and go like crazy.
Where hive entrances/exits are concerned the departing bees crawl up from the entrance and take off from above the entrance while returning bees land below the entrance and walk up to it. It's part of bee effiecency. The lower hive body makes a very good landing board.
For bees landing boards are better vertical than horizontal. More natural, watch a feral hive and see.