More on topic: I played some deckbuilding game the other night in a game store having no experience with any deckbuilding game but Dominion. It quickly became clear that every card that came into the marketplace was going to be different, and I had no idea of what to expect, with respect even to categories, much less synergies. On about turn three, I bought a card from the fixed supply rather that the marketplace - it was a card that gave me more money to spend each turn.
Because it cost me 3 to buy, and gave me +2 currency each play, as I reached for it I mumbled "I'll just buy a silver". It was a card with a figure on it, and no silver to be seen anywhere, and the woman that played next looked at me like I was nuts.