Shower tile, small or big

[Dennis Powers]

Hi I'm asking advice, I own sober homes in Boston area so my properties get a little bit more wear than normal apartments. I would compare to dorm style living. I’m finishing the rough on a 30 bedroom 5 bathroom. Do I install white subway tile 2x6 like always or should I go big 12x24 less grout lines means less mildew. But bigger tiles make me nervous of cracking? What do u install?