It would be difficult to choose just one flower but I'd have to say mine is the big, bright sunflower …. or any variety of sunflower. I feed sunflower seeds to the birds in the winter and they, in turn, plant seeds all over my backyard for me and the bees to enjoy in the early summer. Then more birds (the little yellow finches and cardinals especially) pluck the maturing seeds, or what the wormy insects don't get. If I could plant my whole yard in sunflowers, I would but my dog Buddy claims so much of it for his jaunts in chasing the squirrels and the birds. I'm thinking a sunflower quilt might be in my future.
There are others also …. marigolds, zinnias, cone flower, morning glory, petunias, honeysuckle, trumpet vine, geraniums. Oh so many that I look forward to reading about your favorites too.