Almost every store-bought kippah I've seen (crocheted, obviously) have the same texture- just plain, solid single crochet. The patterning is all done with color-work, which a machine can do more intricately than I can- probably than any person can.
But I've barely seen any texture in such kippot, except in one "model" or two, with a sort of cross-over stitch (not one I know how to make, yet, actually) that makes up the pattern.
A handmade kippah can be made with all sorts of different stitches and textures- single crochet in the standard variation, single crochet that goes through only the second side of each stitch (leaving a small ridge), double crochet, or a variety of combination stitches- I've tried leaf stitch very successfully. (Leaf stitch is: two single crochet in one stitch, skip the next, repeat. Adding stitches seems not to make too big a different in the pattern- I've been adding a third stitch to the 2 stitch spaces, and leaving the skips alone, which comes out well.)
I am making an attempt at moss stitch (an aran stitch, according to a book I have) now, although as a first attempt, I don't know that I'll make the whole kippah in that stitch. It could be interesting to do some stripes in this pattern...
I've seen one or two kippot made with different textures, by other people, but not often.
I can never tell whether the texturing that I do is for my own enjoyment, or whether the people who wear my kippot appreciate it. My husband seems to enjoy it- or says so when I ask. I do wonder how much it is noticeable.