This is a beautiful macro shot. You got sharp focus at the point of visual resolution, and the OOF areas lend a painterly, mystical quality to the image. It looks like tentacles emerging out of a fiery nebula. Nonetheless, I think the composition could be a bit stronger. The flower is not completely centered, but the point of resolution lands too close to the center, and the bottom part of the flower is slipping out of the frame too much.
As for the others, again, you have compositional problems. Try experimenting with the "rule of thirds" as a starting point (google it if you're not familiar with the term). Your photos are too centered and therefore static. The eye is naturally attracted to the center of anything with four edges (that is, all photos), so by placing your subject/point of resolution outside of the center, you encourage the eye to travel. The longer you can keep the eye moving around in a frame, the more successful your photo will be.
Also, keep in mind that you are responsible for everything in the frame; anything that is not helping the photo shouldn't be there. Look into the corners when you're composing. Move around and up and down to get the best angle.