Some gamers have them. Some don’t. It’s not even exclusive to gamers. Even movie and music fans have them. And don’t forget book lovers too.
My backlog isn’t much. Two to three games max? That’s because I’m frugal and tend to finish what I purchase before committing to another purchase. This is why Lost Odyssey was the only game in my back log for the past six months. And now it’s on its way to the completion pile.