I have favourite cities more so than favourite countries.
In no particular order:
Toronto, ON: I went to school and worked in Toronto and can say it's one of the few cities in the world where I felt at home. It has everything I look for in a city and more.
Montreal, QC: Lived there for a few years. An absolutely beautiful city. Although a bit too chill for me. It's more of a place that I like to visit than live in. It's splendid in the summer, and there are always music festivals and outdoor activities going on.
London, UK: Not for everyone, but definitely for me. Despite its size, it works well and is efficient. Contrary to what many think, Londoners are friendly—as long as you don't get in their way! I think the same can be said about most big cities. The Tube is hands down my favourite public transit system in the world.
Chicago, IL: Many compare it to Toronto. I can definitely see the similarity. I love the proximity of the city to the beach.
Istanbul, Turkey: Middle East meets West.
Barcelona, Spain: Not a city I would live in, but a great getaway for a few days.
Berlin, Germany: I've been there a couple of times and can easily see myself living there. It's huge, yet somehow I don't find it overwhelming at all.
San Diego, CA: If I ever move to the West Coast of the US, it'd probably be to San Diego. It has a perfect mix of city life and beach life.
Santiago, Chile: Haven't been there yet, but it's at the top of my list right now, and something about it tells me that I'd love it.
Iceland. It is the most fantastic place to do ABSOLUTELY NOTHING in...and feel great all the time. Because of the volcanic rock (high magnetic content) and the geothermal activity, Iceland just makes you feel healthy, relaxed and grounded. Icelandic air is pure and you realize how polluted the air you breathe everyday is in comparison. There are so few people there, that there is hardly any stress or crowds. I'd go back in an instant!