Thanks so much everyone, suddenly I have lots of options!
A bit of clarification: The map I posted above wasn't clear enough, the red line was supposed to point to the pin for Marche Belleville, my Airbnb is next to Marche Belleville.
I've been to Paris twice, have visited some of the big tourist spots before - I will gladly revisit the Louvre as many times as I have time for, if schedule allows. Otherwise I just enjoy walking around the area. I see on the map that there's a huge Cemetery du Pere Lachaise not far from me, with tomb of Edith Piaf, Chopin, Bizet, Jim Morrison(?), Proust, Modigliani, many others. Will definitely go walk around in there. And I see what looks to be a Chinatown, a whole pile of Chinese restaurants and stores, just a few blocks NW, will definitely go browse.
Do you have any recs for secondhand fashion shops, with focus on bags/purses? She likes browsing vintage fashion. Wife will like purses etc, and appreciate the comments about which brands have the best price differential between US and EU. Don't worry too much about budget, we won't buy that much but we really enjoy the browsing. (At the same time, don't point us to a private shopper or boutique where they would be offended if we just window shopped; wasted a bunch of their time and then didn't buy anything.)
Will definitely visit E. Dehillerin, I'm a nerd for kitchen stuff.
I remember visiting a small leather maker who did watch straps and bags during a previous trip, and I enjoy "small craftsman" stuff, any genre.
I also enjoy local open markets, looking online I see that there are quite a few morning markets around the area.
What's the best way to make restaurant reservations if I don't have a hotel concierge? Will English and some broken French work if I call them myself? (studied French in a past life, was actually conversationally fluent at one point, now I barely remember bonjour and merci)
I don't think Versailles/Disney are negotiable, one of them may be, but not both. Will keep the comments about weather in mind and may play it by ear to go on the nicest day we have. Wife also wanted to visit La Vallee Village outlets near Disney - is it worth the visit?
Again, thank you!!