Beginner's question: opinion on cropping

Hey Greg, thanks for your perspective. It hadn't occurred to me that people printing your wildlife photos would apply their own creativity to your shot, and crop it into a composition that fits the needs of their poster or magazine or whatever, but that makes a lot of sense.

When you say you use the center AF point, does that mean that each bird shot is originally centered on the bird's eye when you take the picture? Or are you focussing on the eye with using One Shot and then recomposing in the frame?

And thanks everyone, for the great discussion.