cool Poll!
Tropical: also Albert Greenburg. I love anything blue, but there is just nothing like AG.
Hardy: Joey Tomocik.
But I've noticed that certain varieties may do better one year or another due to the weather. I had a great Helvola season last year, the year before was rotten. Had a rotten Patio Joe last year, previous year was great.
I move the "performing" lilies to center stage when they're doing well, and they automatically become my favorites for the year.