My top 10 for U.S.: (For beauty)
1) NYC
2) San Francisco
3) Chicago
4) Seattle
5) Miami
6) Boston
7) Philadelphia
8) Dallas
9) Honolulu
10) Los Angeles
My top 10 for Asia: (For beauty)
1) Shanghai
2) Hong Kong
3) Shenzhen
4) Tokyo
5) Chongqing
6) Singapore
7) Doha
8) Beijing
9) Tehran (I actually think it looks cool, with the mountains).
10) Sheyang
These are all IMO, and are not to be taken as fact.
I'm a big fan of Asian cities. Chongqing and Shenzhen.