That's an awesome sweater, Lizard! I've never been taught cable, but I used to do argyle. I've made argyle sweaters for two different boyfriends and one for myself, but it's been a while.
One Christmas a couple years ago I made scarves where I knit with 3 yarns at once and gradually switched out one at a time, so the colors gradually changed. It was very involving and I loved doing them. I must have made a dozen of them. I let people choose the color schemes they wanted and then just played. All knit, no purl or patterns, fairly large needles, so it went quickly. I have a LOT of yarn in smaller quantities.