Lovely image. Blurred background gives and excellent contrast to the nicely focused butterfly and flower. Nice and clear without being overly sharp. I would crop more from left and top to get the butterfly and foreground flower more from the vertical and horizontal center.
Nice photo... I like the blurred background, it makes the butterfly stand out more, I think that the top could have been cropped a little bit more, otherwise I don't see anything wrong with this photo.
Pretty shot. I'd like to see a bigger version of this. Colours, lighting and DOF are all good and focus looks like it's where it should be. I'd suggest cropping some off the top and bottom.