First off, I loved that I used yarn I liked a little to make socks I like a lot.
Another technique I tried was reversing the second half of the boomerang heel to put the smooth side of the stockinette against the sole of my foot. That it made the seam line stand out more was just a bonus. In spite of that, I can't feel it when I walk on it. In fact, since the bulk of the seam line yarn is on the outside and not the inside of the sock, it is even less noticeable.
I mean, I think it really makes a difference, but am aware that I might be the only one who appreciates it. On reflection, I now realize that I took a lot of extra time and trouble to make a pair of socks that look very little different than they would have if I had just knit them plain, easily and quickly. If I look at the result, a pair of rather obnoxious orange socks, I can't say it was worth it. However, when I think back to how much I enjoyed working out the issues, controlling the colors and putting my own twist on orange stripes, I realize the fun was in the knitting as much as the wearing. I really enjoy the process more when it includes a problem to solve, even if the only problem is satisfying myself.
Regardless of the effort, the matching stripes in the legs and the cute pink toes tickle me to death. I've been wearing them a lot. They're perfect.
Try these links for the two-stranded tubular cast-on:
I'll be working out the directions for reversing the second half of the heel--maybe as a pattern addendum.