I've just finished the most intricate pair of socks I've ever tackled. (Owlie Socks by Julie Elswick Suchomel, a free Ravelry download) They have cables that go all the way down to the tips of the toes. They're top down with heel flaps, both techniques I rarely use.
There are owls on the heel flaps!
And they don't fit. All is not completely lost because they fit Teenage Daughter and she likes owls, but I hate that they don't fit. I should have made the larger size. I know that cables pull in and make things tighter. But sometimes you just plunge on knowing that you're headed down the wrong route.
I like this pattern, but not enough to do it again right now. If I ever do make another pair of Owlie socks, I'm doing them a little bit differently. For now, I'm already halfway done with another pair of socks that I like even better and I'm sure I've tweaked the patterns just enough that they'll fit me even if they do have cables.