Ugh all this books on display judging is so desperate and snobbish.
astralweaks your post in particular is just utter wank. I can't think of anything that anyone needs constant access to in a house. Possible running water. Definitely not books. You can only physically read one at a time, after all.
"Why on earth [...] would you hide them or keep them in the dark?"
Well in the case of really beautiful first editions etc. to keep them in as close to archival conditions as possible 
"Books are beautiful" All books? really? even the tattered third editions I bought when a poor student? The contents might be beautiful, or enriching, or interesting, but I don't personally consider a tea stained cheapy penguin to be of huge display value myself.
People who don't have books on display could be intellectual pygmies who have never had an original thought in their life, as some posters are implying.
Or: they could be dyslexic. Could have millions of books, just on kindle. Could have lived in multiple different countries and had to dispose of most of their belongings. Could just store their books in their bedroom, a place where (personally) 99% of my friends/family/acquaintances etc. would never go. Could have a huge study/library separate from the 'entertaining' areas of the home so they can display their 'beautiful' books without the need to worry that a child will draw over them/guest will tip tea etc. Why judge on something so ridiculous?
Same with the poster who slates mass production items. If your 'ancient welsh dresser' had been handed down from your mamgu, who had inherited it from hers, and you had fond memories of helping her polish it when you stayed as a child or whatever, then fair enough, perhaps it would be an item that 'said something about you and your family.' But as you 'picked it up for £10 on gumtree' then basically you just chose an item of furniture you liked the look of, at a price you could afford, from a commercial retail site. In exactly the same way someone who bought their dresser from ikea or next would have done. You just have slightly different tastes, it doesn't make you a superior person, or your home more homely and unique.
Basically, OP, show home on MN is a way of saying 'excessively tidy, neutrally decorated...and likely to be lived in by someone working or lower middle class.' because nobody else ~ever~ buys new 