I have yet to cast on for the second sock, but I've done myself a little chart which combines the Honeycomb element from the Drunken Bees pattern, with a slightly-amended-to-fit-the-stitch-count Waterfall Rib (from Sensational Knitted Socks).
My theory is that this way, the socks will retain the same feel whilst being different enough that I won't go completely doo-lally knitting the same thing over again. (I've completed an identical pair of Bayerische socks. I don't have to prove my stamina to anyone!) If I knitted a completely different sock, the fit would be different and that would drive me a just a little bit more nuts.