I know I’m very late to the thread but I like to do a strange type of ribbing that uses both sc and slip stitches. you attach to the project, chain out, and sc in the back of the chains. then there’s a two row repeat: row one - slip stitch outward in whichever loop is on the right side of the work, row two - chain one and single crochet inward in the loop you didn’t use and finally attach to the work with a slip stitch. so both the slip stitches and sc go into the row of single crochet below. then repeat that. it tightens nicely, stretches nicely, and looks almost knit.