Hi Dan -
Great points, committing to a pattern seems key. All the questions obviously come from not knowing the installation gotchas. I like the pattern you shared. One of our material choices is probably twice the length of the rectangular tile in your layout. We will play around with your idea...
Hello Forum - for a lower level media room (13-ft x 30-ft), our goal is to used two (or more) tile sizes as well as a carpet tile plank in a 'Mondrian' pattern (example attached). May not stick strictly to the pattern, but it provides you with a look. Room is currently full carpet over concrete...