The first shot is really good. One of the rules of composition is to never place the subject in the center of the picture. Well so much for the rules. They are made to be broken. In this case it works very well. You have a good since of creativity.
On shot two it's really nice to have the background out of focus. It's called Bokeh. However it doesn't work very well when both subject and background is out of focus. You don't site the EXIF data. Curt is right you need to stop down to get a better depth of field, (if at f/3.5 go to f/8 or f/11), and bring the entire flower in focus.