I use 440C for stainless kitchen knives that I won't be sharpening. It's very stain resistent and pretty easy to sharpen. In my kitchen, we have BG42 and ATS-34. I like the BG42 better, by a small margin, but ATS-34 and 154CM are great steels as well, and I'll use S30V for the next addition to our kitchen, and I really want to make a vegatable slicer with D-2, because of the large carbides and resulting aggressive edge. The most used knife in our butcher block is made of an M2 sawzall blade. I've only sharpened it twice in over a year and it's still shaving sharp. With an acid etched finish, it doesn't rust readily, either.
Daniel Koster makes some kitchen knives, so maybe he'll chime in here with his favorites.
Todd