Agreed, but it is a rather subjective question so you probably won't reach a definitive conclusion. Assuming you are talking about external USB drives, I think **exFAT** would be the best. It has native read/write capabilities within both Windows & macOS, and currently those operating systems are prevalent in over 98% of the desktop/laptop computers in the world. For the other two percent using Linux, the [procedure to configure those machines to utilize exFAT](https://www.howtogeek.com/235655/how-to-mount-and-use-an-exfat-drive-on-linux/) with full read-write support is relatively simple.
– Run5kMar 13 '17 at 12:30