Yes, I think I am somewhere along the same paths you guys take. Like you, CK, there are few books on my groaning shelves (in every single room of the house bar none!) that I have not read at least twice, unless they are the squirrel store I lay up for future choice.
And like you, Alex, I re-read for quite a variety of reasons - one of which is very definitely along the lines of the quote. If a book's reading does not entail some change in state of the reader, why bother?
But sometimes I will go back out of curiosity or other reasons. For example, when ill I took the time in bed to slice through all the Hornblower novels which I last read when I was ten-twelve. It was largely triggered by several mentions in this forum.
I re-read collections and anthologies of poetry on a fairly regular basis, re-read bridge books in a hopeless attempt to land that 7NT on a combined Vienna Coup and revolving squeeze, re-read some light fiction just for fun, and some classics to sharpen my mind's teeth.
