Contre Sunflower

I adore sunflowers, I think they bring extra light and energy into any place. I like the filter you chose to cover the photo, it gives it more of a rustic and soft look rather then the full on colors. I think it is a well taken photo, with good focus.
Other than that, I only think the angle could have been changes slightly, rather then just taking an near perfect centered photo of the sunflower.
However, that being said, I don't believe the current photo is diminished from the angle it was taken in. I would encourage you to experiment with taking different angles of all items and things (like peeling paint from a bench as an ex), and with using and layering different filters.