I've found white flowers the most difficult so far to photograph. It's hard to avoid them looking flat when they're lit up. And they always need some cleanup; stray pollen grains, bits of fuzz stuck on the petals.... things you don't see until you look at it through a macro lens! Q-tips come in handy. So do small fingers with a dainty touch.
I sourced this from the vacant lot around the corner thinking it was chamomile, but it might just be some sort of daisy. I think it's artsy and pretty... although it's kind of weird to compliment a weed like that since these things usually just get pulled out from the lawn along with 4-letter words.