I was in Lisbon for only one day, as I spent most of my trip in Porto. Compared to Porto, Lisbon is more similar to other European cities I have visited before. It reminded me a bit of Milan. If you want to see unique architecture that sends you back in time, I would recommend visiting Porto. However, if you want to visit a city where you can do a lot and meet people from all over the world (expats, digital nomads, students), Lisbon is the place for you.
I visited the city in winter, so it was not as lively as I would expect in summer.

But see for yourself. I hope you enjoy the little virtual tour! 🙂