Not sure if this was posted elsewhere, but for anyone who doesn't think that Cousins can continue to grow and develop into an even better QB, read this:
Overlooked Kirk Cousins Has Studied His Way to the Top of the Game | Bleacher Report
Love the character that this shows. I read this article to my kids last night (they're 10 and 11) to illustrate the importance of hard work/preparation, perseverance, and believing in yourself. Even my 10-year old daughter paid rapt attention, and she isn't a football fan (yet).