Very nice. Its hard for me to tell this morning, but in the first one the focus looks a bit soft to me. Most people here will tell you that they are too centered, but with flowers, especially single flowers, I often times find centering works well, especailly if you are going for a more artistic feel. Just remember that while "the rule of thirds" is an integral part of photography, it is only a guideline and the rule can be broken. Nice job.