In honor of the Hunger Games

I am a big fan of The Hunger Games. One of the few YA books I think is well-written. I just finished reading an article about the names in the series (http://www.slate.com/blogs/browbeat/2012/03/21/the_hunger_games_names_explained.html). It got me thinking about the book I'm writing. I finished it about two months ago and until now I'm starting the rewriting process. Anyways, When I was first writing it everyone's name was X, Mr. X, or Mrs. X. Until I was finishing up the story did I appoint each character a name. Just as in The Hunger Games, the names I gave my characters are indicative of their personalities and history, and even future.
Do you think this is common practice for all writers? Every time I read a book, I look up the meaning of names.  Just to get more of an idea of the character. Sometimes, it's obvious that they don't mean anything. However, other times, it's just as much part of the story are the story itself.