I love the Agastache called Acapulco series. They have come back for three years now. I have orange, purple and a red color. They are awesome! I rooted cuttings last year. I never cut them back until Spring. I think this helps prevent winter losses. If you want some awesome plants, try the Acapulco series.
My other favorite is Golden Jubilee. It comes back every year and attracts Goldfinches when it goes to seed.
I ordered Agastache 'Summer Glow. I enjoyed my Agastache so much last year that I decided to only order them and a few other plants this year. They bloom constantly for me until frost.
I'm so glad to find this forum. I can't wait to share my experiences and learn from all of you too. I'm hoping we can discuss cuttings and how to have more Agastache to take root.