All of them. I don't know about anybody else, but I use the figures that I have things for. The figures with the fewest things get used the least because there's not much flexibility in how they get used. My hopes for Wardrobe Wizard are being somewhat dashed by the program only so far supporting humanoid figures. Not many (if any) figure creators are paying the $100 to have one of their figures converted for the program. I can only guess that they don't think that the cost will be recoverable by additional sales.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon