Like l'Orsay, but a hundred times over, the louvre is total sensory overkill and there's no way you could possibly take in everything in a hundred years. Every corner you turn, there's another crucial and awesome masterpiece of art, and you just start thinking "Who decided that the Monal Lisa is so great, and this painting here isn't as good? This painting's pretty effing great." and those thoughts eventually turn into "I have to get out of here. But dude... the Raft of the fucking Medusa... LIBERTY LEADING THE PEOPLE ACK!"