I went between the Olympics and Paralympics. I liked it a lot. Wandering streets in the Latin Quarter. Poking around random shops and such.
Went to see Notre Dame, the Arc and the Effiel Tower as the main attractions.
I went to the Louvre but its was crazy busy, even on a weekday. Kind of hard to enjoy it and there were very few places to sit, even less where you could sit and enjoy the artwork. Still went to have a look at Lisa and Venus, pretty neat.
The food (as long as you stay away from tourist traps) was great! Do try a baguette by itself if you can. I had no idea bread could be so deep and complex and just damn tasty by itself.