Thanks to a work trip and some vacation days bolted on to the end of it, I have a real whirlwind solo survey of a few European cities coming up. All I have planned is "walk a lot". It feels really good. I love my family but I don't need them everywhere with me. I feel this is a healthy view.
Also: interested in your perspectives on can't-miss cities. The idea here is to get a taste for a few I want to see more of later.