Did a hard core galleries tour this week. Renoir museum, Orsay, Pompidou, Quai Branly, Orangerie, Jeu de Paume. Sadly a couple of places I really wanted to visit where closed - but It would have been hard to press anything more in.The Orsay is my favorite of the Paris museums. Though I do love the Orangerie as well, I could sit and look at Monet's Water Lilies for hours.
My favourites are Orsay, Pompidou and Quai Branly. Both for their art and for the architecture(s) - I find that to be an experience in itself.