I keep an eye on the Go/Baduk subreddit and answer random questions when it feels like I have something to contribute.
In one question "If aliens exist and they play Go, which board size do they mainly play on?", a lot of the usual arguments were totted out, the best balance between the 3rd and 4th line (see my previous posts on this subject), a slightly tongue-in-cheek 19x19x19, the odd, rectangular board size.