My next project is Firestarter socks, by Yarnmissa. I've had these in my queue for what feels like forever, but have been reluctant to start them, partly because they are toe up, which means learning a new construction, but also because I'm making them from handspun, which has been sitting in my stash since May 2012. My reluctance comes from the fact that my handspun socks (not all handspun socks, but certainly mine) don't wear as well as my mill spun socks.
Two unfortunate pieces of evidence for this can be found in my darning box right now.
If you recall, I actually didn't originally intend to spin the yarn I am using for socks at all, I was trying for enough for a shawl, it just came out short. So, I'll knit socks from it, learn a new construction, and perhaps after some good wear get to practice my various methods of repairing socks.