[hiddew]

Yes, a grid system like H3 https://www.uber.com/en-NL/blog/h3/ is is closer to a circle in shape. One of the reasons for Uber to use H3 is bacause density maps look more natural in hexagonal shapes. It would be interesting to see the answer for H3 hexes.

[nerdponx]

There are a lot of nice things about H3. At work it's our default tool for partitioning and indexing of horizontal position data.

[KeplerBoy]

Are you using it for non geospatial data?