So, with all the sets that are out there now; the possible number of different games you could play is insanely huge. Even if you don't count different Black Market setups. But, many of these games are so similar to each other that they may as well be the same. After all, it's rare (if ever) that all 10 Kingdom cards matter.
So, about how many different games of Dominion are there? I mean, if you have Ironworks, Chapel, and Garden present; there's probably only a few different configurations that matter for the rest of the cards; the majority of the Kingdom will be ignored by decent players.
Obviously it's subjective, and matters how specific you choose to be with your categories. But what do you guys think? What are some high-level categories; and how many different meaningful Kingdoms in each category?