What are the best knitting or crochet stitches for unusual yarns?

I bought a bulky (works on size 10.5 American needle) black boucle yarn with a bit of white and a thread of mylar for sparkle. What is the best knitting or crochet stitch to show off the yarn? And I have a 1/2 inch wide multicolor ribbon yarn. How do I show off the yarn/colors? Long stitches seem to be my only choice, so far. Are there others?