When I am in a Board, looking at the cards, I would like to be able to choose to display some information from the card instead of going into each one. For some (most) boards, I'd like the to see the first few lines of the details.
For other boards, I would like to be able to define a price or cost field, and show that. Specifically, I could make a Budget board, and have items shown wit a few lines of detail, and the cost. It would let me work with cards very quickly.