yesterday i played a fun game with fishing village, duchess, duke, and caravan. we both went for duchies early, and took the free duchesses (something I would do even without fishing village but which I think is undebate-ably the right move with fishing villages).
many times in the game i'd have loads of extra actions (from having played fishing villages the turn before) and blindly play my caravans, when I could instead have used duchess to check if i was drawing a bad card or not. the most frustrating part was that I did this at least twice even after realizing that I was making a mistake.
basically, the top four reasons i will never be a top ten dominion player:
1. playing on autopilot like this
2. trying to make fun but bad cards work
3. ragequitting when there's a 20% chance of winning
4. obi wan bonogi