I do not like this idea.
Our goal is not to show off or present our personal achievements, that's what "rep-addicts" do. It is to build a useful and comprehensive set of answers to programming problems.
How would the change you propose make the Internet or at least Stack Overflow a better place? It is all about dragging focus away from the site's core (which is concentrating on clear and easy-to-find information) towards a place where everything you do is collected in your personal portfolio of actions. That's a social network.
Please remember that users are not our most valuable resource. It's the content posted by them.
Please note: I can't deal with words, so I stole some of them from Cody Grayfrom Cody Gray. He really hits the spot with that post, although on a different topic.