There has, over recent years, been a large uptick in new villas built on Samui for residential but primarily for the rental market. Land as on any small island is finite, and the vast majority of new villas recently constructed sit on tiny parcels of land, overlooked and overlooking neighbours, some of them so close you feel you can reach out and touch the adjacent property.
We bought the land on a private mountain where no further building is allowed, before this 'rush' and were able to secure almost 4, 500 sqm and are not overlooked on any side, and have unobstructed 180 degree sea views, and complete privacy.
When on vacation, I think that counts a lot.