We've been using the Prosperity, Alchemy, and Dark Ages expansions, and they really add a lot of depth and enjoyment to the game. We use the Platinum treasure c

We've been using the Prosperity, Alchemy, and Dark Ages expansions, and they really add a lot of depth and enjoyment to the game. We use the Platinum treasure cards and Colony victory cards from Prosperity in each game, which can speed up the game and change how it plays. Maybe the game was designed to prevent players from "topping out" by limiting how much treasure or victory they can buy in a turn, but we don't like feeling limited. Our house rule is we can't play with more than 1 stack of "+2 action" cards, because most of us will just buy those and combo them with "+ draw" cards, which give us "+ action" cards, eventually allowing the entire deck to be drawn, and ~30 victory points gained each turn. For an interesting variation on this idea, try Quarriors -- it's like Dominion but with dice, with some faces being treasure/currency, and other faces being the creature/attack spell.