I like to eat selected flowers while I'm working in the garden: few borage flowers here, some rosemary flowers there, a nasturtium or two, a handful of violas. But I've brought a selection of edible flowers to a potluck and one person remembered me 5-6 years later because of that! It's also fun to sprinkle a few flowers on a salad at the last minute -- more to feed the eye. Most of them wilt quickly. When I was giving a cousin a tour of my garden and offered her a nasturtium, she said, "you first."