I don't care telling someone what "page" I'm in

Usually the ones I talk to about a book know the printed book, not the eBook one

And so even if I tell them I'm on page 120, this will not be the page 120 of the printed book ^^
Usually I talk more about chapters than pages
But I think we should have the choice: a %, the number of page according to chapter, or end of book, or a fixed page system, this way we have the best of all worlds ^^
The fact is I don't like turning two pages to see the page number increased by one, and I like to know how many pages left till the end of the chapter, so I could know if it is doable or not to go to the end of chapter before going to sleep...