One of the best things about living in Paris for a few months is being able to go back to museums like the Louvre and the D'Orsay and really spend some time there. Usually, when I am travelling, I make a mad dash through the museums and then on it's to the next place.
The Louvre is open until 9:30 pm on Friday nights and since D was working late, I took advantage and spent a couple of hours enjoying it. It is so vast! I don't know if it is possible to see the entire museum even in multiple visits. Plus, I usually end up people watching as much as anything.