for EDC I like to have a few options:
flipper
ball bearing pivot
3-4 inch blade. could be smaller or bigger, but in general 3-4 inches is good for me for EDC
a nice functioning pocket clip. has to be not too tight as to hinder a draw, but tight enough to have retention, but most times I carry it inside the pocket without the clip on the pocket. also like to have the clip able to hook well to my belt, although I don't carry it this way that often.
G10, aluminum, or similar grip
not too much if any serrations on the blade. I like a tanto or a spearpoint type blade for edc
not sure yet of what type of steel I prefer, but I'm liking D2 steel lately, but i'm not that knowledgeable about what type of steel is good for what