Heh, I have to admit - I took that shot partially because I was curious about how well the lens would resolve that detail, particularly in the corner of the frame. One of those 'well, while I'm standing here shooting...' moments.
The Harley guy was a shot where the detail resolution did exactly what I wanted from a composition standpoint. I love the rough looking guy with the Harley shirt, spiky hat, etc standing at a fair with his kid. Some of the lenses I've been using recently wouldn't have done such a nice job with the detail at f/5.6 or so.