The 2005 one is my favorite, and I especially love the part at the end of the movie when Elizabeth says that Mr. Darcy is only allowed to call her Mrs. Darcy when he is "Completely and perfectly and incandescently happy".
I just love that phrase: Incandescently happy.
When I am very very happy, I secretly think to myself that I'm not just happy, but incandescently happy.
It's the best kind of mood to be in.