both, some quilts are beautiful with colors already picked out, if you like it that way, why spend hours trying to figure out colors is my sentiment. I buy lots of kits, especially if they involve a lot of small appliques pieces that require a lot of scraps and can get pricey shopping for. I do shop for my own fabrics for certain patters especially if I don't like their colors on the pattern. I think it varies among quilters, some like to have a unique look, some like to replicate the color scheme because they like the look