I've always based casualty figures. I know many gamers just leave them "loose", but I like to have everything on a base as I think it looks neater and of course you can then add other bits and bobs like muskets, hats etc (which come with the plastic British infantryman casualty that is also in the Perry cavalry sets). Front Rank sell packs of pistols, muskets, swords etc which are useful for adding to casualty bases. One thing I've noticed about Perry casualty packs is that they tend to have "character" figures in them - for example, the falling officer in FN16, the wounded man being carried by comrades in a couple of the AWI packs. These are lovely little pieces, but they do stand out rather and that means you're unlikely to buy more than one or (at most) two of each pack. For large Napoleonic battles, what a gamer really needs is just a pack of 6 different dead people.
Five figures. Painted August 2013.