I have only grown Dahlias once. In a large container in a sunny position, against a warm wall. They hated it!
Since then I haven’t given them much thought.
I’ve also often thought of them as “blousy”, i.e. a bit loud and garish.
Then I saw this:
… and started looking around and found this:
Now I’ve got my gardening catalogues out again…

Courtesy of http://commons.wikimedia.org
It’s just a question of choosing which ones… decisions, decisions!

Courtesy of http://commons.wikimedia.org
Do you grow dahlias?