HAVE to be roses, just because the blue and gold. I grew both sets on my own, and the feeling after doing it is just magical. Yes, I did use "hybrid red", not the way Thonky said but by the Japanese guide, and placed those red into my museum after I did it a second time to get 2 blue, which also gave me a LOT of black in the process, which I let wilt and got gold- just LOVE the roses!!
I really love the purple pansies. The shading was really well done. They're my favorite. I also like the purple tulips, blue roses, blue violets, and the white carnations.