After knitting my first simple pair of socks last time, I was looking forward to trying a more complex pattern. I went with the River Rapids pattern by Sockbug on Ravelry. It's not hard, but the faux-cabled lacy pattern looks fancy. I made the socks shorter than the pattern calls for since I was worried about them being too tight on my calves, but I don't think they would be. Overall, it's a really nice pattern that's not too difficult!