After a few (4 or 5) tries I have begun to knit a scarf in fisherman’s rib (or something like it). Once I tried this stitch, I loved it. The puffy feel will make a snuggly scarf, if I can make it without making mistakes.
The stitch I am using is simply K1b (knit one below) and P1 (purl one). I guess there are many variations of the Fisherman’s Rib, and this is one of the easiest I’ve found.
I began with white worsted weight yarn (Cascade 220), and have added a new color, Artemisia Green worsted twist (which is a little more heavy). The rest of the scarf will be done in the Worsted Twist, which is a softer yarn than the Cascade. (I finished up using the following colors: Rose Granite, Gray Fig, Heirloom White, and Sea Salt.
My scarf will be big chunks of color, from light to dark and maybe back to light again. As I knit, I may change my mind about the colors, but each color will transition with a couple of rows combined with the previous color.

How I Made It
Yarn: Purl Soho’s Worsted Twist in these colors: Heirloom White, Artemisia Green (looks more gray), Rose Granite, Sea Salt, and Gray Fig (darkest color).
Needles: size 10
Cast on 32 stitches, or an even number, using long-tail cast on.
Knit 1, Purl 1 across, ending with a purl.
Slip the first stitch purl-wise. (You will do this on every row which will make a neater edge than shown on my scarf.)
***I suggest you follow this Free Pattern at Churchmouse Yarns and Teas. I didn’t find it until I was through knitting my scarf.
Also when weaving in the tails do this along the inner (lower) set of stitches to hide stitches.
I am happy with my finished product and am currently knitting a white scarf like it.
And I have made a hat in the same colors which I call the Dusty Rose Long Rib Hat.
Fisherman’s Rib doesn’t work the same way for a hat because you are knitting around and around without turning the item. There is a way to do it, but it’s more difficult. Find this free Fisherman’s Rib Hat pattern on Ravelry.