It's very situational. These are the non-mystery-stainless steels I have had experience with thus far:
-AUS8 is kinda looked down upon around here, but I like it for beater knives. The edge will roll before it chips, and it takes a pretty good edge pretty quickly.
-8Cr13MoV is often said to be equivalent to AUS8, but I find it chips more easily. It does seem to take a finer edge, however.
-S30V and VG-10 have fantastic wear resistance, but are more prone to chipping on impact with tougher materials. It's a great steel for light cutting and slicing.
-13c26 Sandvik has proven to be a very good steel in my uses. In my opinion, it's a kind of compromise between AUS8 and S30V. It seems to keep an edge very well, but also has relatively good toughness for the price range such steel is used in. I've had a Kershaw RAM as a side-carry knife for some time now, and I've yet to put a chip or a fold in the blade.
-Elmax is one of my favorite steels, with high impact resistance, high wear resistance, and high corrosion resistance.
-204p is currently my absolute favorite steel that I have used. I have a Southard that I use every day, and without hesitation. After 90 days of use, which has included accidentally hitting the edge into some very hard materials (like a metal pipe with a lot of force), there is no noticeable edge damage and it still shaves hairs off of my arm without digging up skin.
I'm looking forward to using M4 in my (hopefully) soon-to-arrive Gayle Bradley, and I'm unashamedly giddy about the prospect of getting a Cold Steel Warcraft Tanto. DLC coated 3V fixed blade for (probably) ~$150-180... Yes please.