Black polished granites, such as Absolute Black, Black Pearl, & Black Galaxy, are beautiful, but will show dust and fingerprints much easier than a gray or brown granite with movement or color variation. However, if you really like those black stones, you could get them in a flamed or brushed finish, which will hide dust and fingerprints much better than a polished surface will. If you do not want to clean your countertop two or three times a day, your best bet would be a tan or gray stone with movement and variation.