This talk by Linus Torvalds was what got me excited about Git: http://www.youtube.com/watch?v=4XpnKHJAok8

I wrote this a while back, but just some things that I found surprising about git as I was learning it.

http://webjazz.blogspot.com/2009/01/git-allows-my-workflow-t...

Try to read the community book (http://book.git-scm.com/) the wow is too big to explain in a simple comment, but basically git (or any DVCS) makes your life a lot easier