Would straight or diagonal look good in my downstairs area? It would be about 750 sq ft and would encompass the great room, open layout kitchen, hall, dining area and foyer....

So I would put furniture in great room, a table in dining and a breakfast table off the kitchen.

Would this be worth the additional cost? About 1k for the diagonal. I always heard it was nicer and made floors look larger?

This is an example of the tile along with the countertop and kitchen Cabinet....we are building a home with a builder.

Also, would the polished tile be too high maintenance and be too slippery with kids? It's not in a zone where the bathrooms are, etc but really just would make contact with water if something spilled in kitchen.

Thank you!