I like the idea to put CV value in empty space, help a lot when you search on eBay
for missing stamps.
I am heartened you said that, it has only been a recent adaption, and has been very helpful as a worldwide collector.
I usually buy collections / pages from the internet, and I can employ this method to see if I can gain stamps, and resell the pages on.
I am also gaining in favour of adding pencilled notes to certain stamps,
Album pages are a personal thing, clean and pretty is OK, but now I find
the tidbits of information, refreshes my knowledge, and adds a certain flavour to the collection.