I'm back from Paris now and my husband and I had a wonderful time. I'm afraid to say we did very little shopping and I did not buy a single thing. (Can you believe it?) But I soaked up the street wear like you wouldn't believe and I wanted to share my notes. Hands down the things that stood out to me the most were

o The scarves-- everyone wore them and everyone seemed able to tie them with such skill. As someone still playing around with this, I was impressed. I did bring a few of my own and used the Angie knot.
o Boots with skinnies tucked in. Both tall and short. I don't think I saw a boot I didn't like. Most of the boots were black or chestnut
o Messenger/sling bags seemed to be the order of the day.

Overall, I was a bit disappointed with street fashion in Paris. I think I had really high expectations though. Everyone was much more casual than I would have expected, more casual than smart casual. This could be related to the fact that I was in touristy areas mostly. People were smarter at night but not excessively so.

Other random notes:
o Apparently the solution in Europe to flats in mid-60 degree weather is to wear your ballet flats or pumps with hose. I'm talking with pants too. Usually the hose was nude.
o I saw a handful of people wearing harem pants. A couple of them pulled it off I think. It was interesting for me to see because I doubt I will ever see them here.
o Black and dark neutrals were not quite as dominant as I expected. In fact red trenches and white pants (although not together) were fairly popular.
o Pretty much everyone wore flats. I think the majority of women I saw wearing heels were riding scooters.
o There was quite a surprising lack of PPL. In fact, a lot of people wearing bootcuts had them cuffed up shorter than PPL. Perhaps to keep the pants from getting dirty? I would say denim was 50/50 bootcut and straight leg/skinny.
o Galleries Lafayettes is insane. I was in there for 45 minutes and made it to the 3rd floor out of about 7 or 8 and I was just browsing.
o My husband astutely noticed that all of the men were always wearing some kind of layer. That is, they never wore just a shirt. Of course, we were outside most of the time.

We did not make it to Le Marais where there might have been more stylish Parisiens? I mostly wore my knee high riding boots as they were comfortable, warm and dry. I guess that completes my random notes. If I remember anything else I'll add them later.