I cant really tell about it,because I havent been to many cities,I will tell the ones I have been in.
1#Ceará-Brazil(state actually)
Really beautiful beaches,really beautiful girls,very calm people tend to be really nice,very laid back place,I used to go to isolated rivers and lakes everyday,the only problem is that is too hot,you cant stay to much in the sun at mid day and is really bad to sleep at night because its too hot.
2#São Paulo-Brazil(also state)
This is the city I was born in so I might be a bit biased,but you will find everything here,all kinds of people from black to northern european looking,really multicultural,the only problem I have its that there are too many assholes.......
3#Nagoya -Japan
I just like everything about it.