I have been researching and looking at tile for our new home for over 6 mos. Unglazed tile will absorb liquids faster and hold more water. They are very hard to keep clean. Getting a darker tile will only mask the dirt. I found a tile made by Anatolia that is slip resistant but still smooth enough to clean easy. I even took samples of tiles, about 8, and lined them on the floor. I spilled some juice and rubbed in some dirt and let it sit for a few hours. The unglazed tile was a nightmare! The tile with bumps and divits was also hard to clean! I had to scrub and rinse the unglazed tile several times and it still was sticky~ Bottom line; Try and decide with your head and not your heart~

Thanks for your comment and bottom line suggestion, Linda. My sister and close neighbor have been advising me of the same thing. Accordingly, I have been doing more investigating into how to easily clean the unglazed porcelain and also checking into other flooring options. My neighbor suggests Marmoleum, which would be appropriate to our 1926 home. My sister-in-law has Marmoleum in her kitchen and strongly recommends it, as she finds it hard to clean. It also does not have the longevity of tile. I have been searching for a matte glazed porcelain floor tile and finally met with some success yesterday. There is a good bit of such tile in black and white, but not much in other colors. Yesterday at Daltile, I found a matte glazed porcelain hex in some colors including a couple greys and a greyish green, which is what I'm after. It comes in various sizes including the 2" hex I am after and can be paired with a 1" square black for the perimeter border I'd like to have. Daltile carries this tile, which is made by Cepac and it can be found on the Cepac website. Good luck!