Liquid Ghost said:Use of Metric System.
I'm tired of calculating back and forth from metric and outdated imperial units.
And this is the best reason for using squares instead of feet. Players around the world can convert squares to 5 feet, or 1.5 m, or whatever system they're using.
I've been known to use 3 foot squares in some instances, and 5 foot squares in others. I find it much more convenient.