I thought of another pattern that's reversible - it's the Fisherman's Rib or Half FR, where you knit all stitches. It's also makes kind of a thermal knit.
CO even number of stitches, knit across first row.
Every row after that - k1, k1B, repeat across to last 2 stitches - k2.
It's very easy, you can knit a few inches in a swatch to try it out.