I had to force the wife to at least dump the paperbacks. It was difficult, but when the truck is half taken up with heavy boxes of books, you gotta put your foot down.
I moved halfway across the country two years ago, for grad school. My book collection took up more space than my clothes, kitchen supplies, and knick-knacks. It'll be the same when I move again this spring. Still I doubt I have more than a thousand books, but I'm young.
I'll probably weed out about seventy or so paperbacks before packing, things that I'll never read again that I got from library sales or used bookstores, but abandon my collection? I'd rather throw out my clothes.