trello
When you click on a card to see its expanded information, you see an Activity section which displays a list of both comments and the automatically-generated "[name] moved this card from [list] to [list]"-type of items.
Is there a way to filter this list so that it only displays comments? Or, better put, is there a filter anywhere?
Or is the fact that I need this a sign that I might be Doing It Wrong?
Deleting non-comment actions is not currently possible. However, making the board private will make those actions visible only to board members.
I know Trello does not have this built in, but if you're open to a 3rd party tool, I might recommend something like Zapier. How useful it would be depends on the level of granularity you desire in your summary.
Consider this Zap: Trello to StatsMix. You could monitor a specific list for new Cards, and update a counter inside StatsMix when that happens.
If you need more information or a different analytics tool, you might look at Leftronic. Or if want to see everything, use Google Spreadsheets and do raw counts.
Best Answer
Trello doesn't currently allow you to filter activity lists.