Flowers are so patient.
With no wind going, they don't fuss, don't wiggle, they don't pull a face, they don't complain about the hundredth photo taken... I think that makes flowers such satisfying objects.
And with colours like these before a sky as blue as this one I find it pretty understandable that you just HAVE TO take a picture such as this one.
DrDan, I like ALL your flower pictures, whether taken in winter or spring (I still have to wait and see what you're going to present us in summer and autumn - ok: fall).