I've spent months in both Paris and SF. I hate walking around SF, and enjoy walking around Paris, at least in the 1st-8th. Density is a feature for walking.

I've spent months in both Paris and SF. I hate walking around SF, and enjoy walking around Paris, at least in the 1st-8th. Density is a feature for walking. Paris isn't perfect, but also has fewer piles of human excrement in the middle of the sidewalk, and in the cases you don't want to walk, the metro actually is usable. (Manhattan > Paris for walking and subway, but Paris is fine).