Top 60 Cities in the World

This is a hobby of mine, ranking cities.  I used to do it a couple of times a month.  What makes a city great, separate from having a lot of people?  I think having a lot of skyscrapers, having a large economy, and having name value recognition.   The most important factor here is the skyline ranking, followed by estimates of GDP.  Some cities with nice skylines are excluded, just because the city otherwise isn't that important or has under 1 million people (Panama City, Macau, Honolulu, Gold Coast City).  And some cities/regions with large economies are excluded because they don't have a city center or are overshadowed by a bigger city (N. New Jersey, Ruhr).  So, in general, this is the skyline rating. Cities that are given a boost because of their economy are shown in italics, but they really should build more skyscrapers.  American cities are in bold, just because. There are only 3 cities from the EU on here - London, Paris and Frankfurt.

1. Hong Kong
2. New York
3. Tokyo
4. Singapore
5. Chicago
6. Dubai/Sharjah
7. Seoul
8. London
9. São Paulo
10. Shanghai
11. Paris
12. Los Angeles
13. Bangkok
14. Moscow
15. Guangzhou/Foshan
16. Washington DC
17. Houston
18. Toronto/Mississauga
19. Dallas/Ft Worth
20. Busan, S. Korea
21. Shenzhen
22. Philadelphia
23. Chongqing, China
24. Osaka, Japan
25. Boston
26. Sydney
27. Incheon (Seoul), S. Korea
28. Kuala Lumpur
29. San Francisco/Oakland, CA 
30. Mumbai
31. Beijing
32. Rio de Janeiro
33. Jakarta
34. Atlanta
35. Istanbul
36. Buenos Aires
37. Miami
38. Melbourne
39. Mexico City
40. Recife, Brazil
41. Wuhan, China
42. Ulsan, S. Korea
43. Manila, Philippines
44. Vancouver
45. Seattle
46. Kyiv (Kiev), Ukraine
47. Montreal
48. Daegu, S. Korea
49. Minneapolis
50. St. Petersburg, Russia
51. Tianjin
52. Dalian, China
53. Phoenix
54. Detroit
55. Curitiba, Brazil
56. Frankfurt, Germany
57. Caracas, Venezuela
58. Doha, Qatar
59. Las Vegas
60. Nanjing, China