Ew, Facebook.
I'm going with AUS8 for its general all-around qualities. It's easy to maintain and get very very sharp (very important to me as while I'm not great at sharpening, I can do it and I'd rather do it myself instead of send it in and be without my knife for over a month), can be polished beautifully, won't hold the edge forever but long enough, is tough and durable, and in my experience relatively rust resistant. VG-10 is a close second, and I'm getting to be a huge fan of S30V, as well, though in my experience it's not super rust resistant.