After several failed attempts at more complicated sock patterns, I fell back to a simple stockinette sock in a previously familiar pattern, the Riverbed Master Pattern from Cat Bordhi's New Pathways for Sock Knitters. Knitting them up to knee length was an idea that I only got when I was already knitting the leg, and started to wonder if I had enough yarn to make them longer. I did, and I still even had some yarn left over. I increased stitches for the calf, and then turned the cuff so there is space for an elastic band inside it. It looks like these are going to be my first knee-length socks that actually stay up. I may have to make more socks like these, but I think next time I will make them with a slightly longer leg. The yarn is Lorna's Laces Shepherd Sock Solid, which I love for its softness. I used 2.5 mm needles for most of the sock, and 2.25 mm ones for the inside edge of the cuff.
More details on the Ravelry project page