I agree that centered is really hard to pull off. Tightly closed buds of the peony are a little uninteresting, unless the DOF is really shallow and something is going on in the background. Maybe a bud a little more open (without the ant, I hate ants unless it's a picture of an ant) like in #4 in front of the leaves in #1, with no grass showing. I hope I'm not being too rude.