The above shot is another from the recent roll of HP5+, this was the first shot with my new 28mm lens.
It's interesting to me for a couple of reasons. First, I was trying some things looking at depth of field although they didn't really work due to the low light (hence slow shutter & slight motion blur).
The second interesting point is to do with my own personal field of view and how it relates to focal length. I've observed through trial that close-up (couple of yards) I see things at around 28mm (35mm equivalent), medium distance (say up to 30-40 yards) I see at around 35mm and for longer distances I tend to see a bit narrower (50-70mm). Only when presented with a wide scenic might I deviate, then I tend to hop between 35mm and 100mm being the difference between "taking in the view" and "looking at a feature".
This is also somewhat borne out by the range of focal lengths I use in my photography (although I've not done any detail analysis short of flipping through EXIF data on several shots).
I think this is why I like my 17-55mm lens for general purpose: it covers me for my natural view of the world over a wide range of subjects.