Aah, Drifter... everything you're made with is gorgeous.
I'm a sucker for a little rolled collar and this is no exception. It gives texture against that lush stocking stitch, and the ribbing on the cardigan is no exception. The construction is simple enough that you could use crazy colours of yarn, scrap yarn, or just a plain coloured yarn and still have a fantastic wearable garment. This is one you'll keep coming back to.
This pattern has been knitted in King Cole Drifter DK, a wonderful self striping cotton/wool/acrylic blend yarn. You'll need 4mm and 3.25mm needles, stitch holders for the jumper, and nine or ten buttons for the cardigan depending on the size you're making.