I think this is a matter of pure personal taste. I (personally) like the same flooring throughout the home. This, in my case, is hardwoods through the main living area, the same tile in the two bath areas. I think having the same tile creates a feeling of flow thru a space. The house we purchased and are in midst of remodel had tile, laminate, engineered wood, slate, carpet, and a different tile. It made the space look so choppy. It looks so much bigger and more cohesive with two flooring choices throughout.

I have a dark slate colored tile by my back entrance and hall that matches the first floor bathroom because those areas are connected. If I had opted for tile in the kitchen I would have used the same tile there as well for continuity (we used wood, as in the rest of the downstairs). I used a different color upstairs, but the same everywhere (three bathrooms and laundry closet) partly for continuity and partly because I just liked it and didn't want to make any more decisions. :)

If you can see one from the other, then it does look better if they do match.

That goes for any flooring of the same media.