Craig,
Not sure what it is (or isn't) about this one that doesn't really strike me as a stunning image. I think it could be a bit lighter and with a little more contrast so that the yellow really stands out with the sky background. Perhaps all it needs is just curve adjustment.
Sure it's a 'nice' shot but there's only a small portion of it that is REALLY sharp - what F were u using on this? Hope you're ok with my upfront and honest critique...
