My opinion dark ages (short as possible for digest!)
- Really good combos in this expansion
- Trashing theme allows for a lot of streamlined decks - you feel like you have a lot more control in many cases
- Lots and lots of new kingdom cards!
- Ruins (new curse-ish cards) are cool, but are only used very rarely.
- More complex than previous sets. Harder to teach and may slow down some players considerably