well, don't know how many, but quite a few, especially medieval en GNW. And I'm starting to get into the Crimean war. (I just bought thw wodnerful foot cossacks and sailors, great set!) And i'm very lucky in having strelts french army camp.
have at least one each of all the crimean range, the ACW staff sets, the medieval big box, the boers and now the ww1 cavalry sets. also GNW and the napoleonic sets. my favorites are the napoleonics staff sets i guess. haven't really counted them all up. just glad to have them.