Over the years I have visited the usual suspects as a tourist and sometimes for work: Paris, Amsterdam, Rome, Madrid, Zurich, Berlin etc and some other cities in the same countries.
Mulling over it, I think Paris remains a place I always love to revisit. It’s not exactly warm and inviting from a people perspective, but the architecture, food, and general feeling of being there makes up for it. I am a history buff so Rome comes in second for me. People-wise I found Barcelona to be most friendly, though I have not been there in a decade now.
What I love most about European cities is that they are all so walk-able, which is in stark contrast to US cities (which I therefore rarely visit as a tourist, only go for work).
My first experience with the internet was using a Unix shell account that I used to dial into using “Telix for DOS”. For browsing I had Lynx, for mail PINE, and for IRC it was some client called “irc” and so on. This was in the early 90s, maybe 1991 or 92.
Everything was text only, dial-up with 9600 baud, and it was glorious because before that all we had was BBSes (which were even more glorious in some ways actually).