Right then.
In the first you very deliberately chose this very wide open aperture that gave you an extremely shallow DOF so that only the one petal sticking out towards us is in focus. While I appreciate your thought and concept, it isn't working for me. I like blurred backgrounds against flower "portraits", in fact I find them very, very necessary, but this DOF is too shallow for my liking and I try and try to adjust my eyes to get the whole flower in focus, and can't.
The second is nicely composed, you get close and let the shapes and lines play for you, but that one looks decidedly overexposed to me.
The butterflies are interesting and look good in their natural (almost) black and white on the red they are sitting on. Do I detect a hint of camera shake in this one??? Could this be? What was your time for that one, can you look it up?