My new job scuttled my tentative plan to head to Xinjiang, China in May, and while casting around for a potential destination for October, my friend and I chanced upon some very nicely priced tickets on Emirates that rather sealed the deal for us. So rather impulsively, we committed ourselves to spend two weeks in London and Paris. I'm not sure how this happened.
In any case, it's my friend's first to both cities but not mine, so I get to play tour guide and we may add a detour to Brussels (is it slightly sad that the city advertises itself as "80 minutes away from Paris"?). I would like to have gone to somewhere I've never been, but my last visit to both cities was in 2007, and I don't think anyone complains about seeing them again.