I don’t know about cities but I do know the next countries on my list are:  

Rwanda – to see if its really that clean

India – to see that many people and try the roti

Brazil – too see the largest black diaspora – I wanted to say out of Africa but I guess that’s implied

Seychelles – to see if the beaches are that beautiful

Cape Town – it’s close to home so I really should find my way there

Australia – to see that music hall bu the water, say hello to skippy the bush kangaroo and finally get to say “I’m down under”

I didn’t write cities because I usually go to the least touristy places not because I’m pretentious but because its usually cheaper and allows me to see the parts of the country that most people miss.

So with that in mind feel free to leave recommendations to a city in each of those countries