Oh man, I absolutely loved the Louvre! I skipped most of the art gallery though, cause I'm just not really into art history. The rest of it was super cool. The medieval section and Napoleon's apartments were my favorite exhibits! The sculpture garden thing was pretty cool too.
Of course, we missed d'Orsay because we lost a day in Paris from food poisoning from the flight over. THANKS AIR CANADA! So it is hard to compare.