1:Some or all of the world's lots are not flat. Use the Flatten Terrain tool before placing a lot, so that the lot is on a completely flat patch of ground (unless there is a very good reason to not have a flat lot, like a beach lot or one built into a hillside). This makes it easier to place and share lots.

3: Most of your lots are flat, but a few are sloped for no obvious reason. Unless a lot is deliberately sloped, such as a hillside or beach lot, it should ideally be flat, to make it easier to share and place custom lots.

5:You have some lots that are not flat, but they make sense to have. Nice work!

5:Your lots are flat. This makes it easy to place and share lots. Thank you!