Anyhow, to get back to the thread topic at-large.
Just to throw this out there. The proclaimed global leader in assessing "city brand" is Simon Anholt and he's been doing it for a very very long time.
These are the results of Simon Anholt's "City Brand Index" in 2013 where over 20,000 people were surveyed, all of them over the age of 18 and in all surveyed countries, the people came from various different backgrounds. At least 500 people minimum were surveyed in each and every single country.
Argentina:
01. New York: 3rd out of 50.
02. Los Angeles: 10th out of 50.
03. Mexico City: 17th out of 50.
04. Chicago: 19th out of 50.
05. San Francisco: 20th out of 50.
06. Toronto: 23rd out of 50.
07. Boston: 26th out of 50.
08. Dallas: 33rd out of 50.
09. Vancouver: 39th out of 50.
10. Seattle: 41st out of 50.
Australia:
01. New York: 4th out of 50.
02. Los Angeles: 7th out of 50.
03. San Francisco: 12th out of 50.
04. Toronto: 19th out of 50.
05. Vancouver: 22nd out of 50.
06. Chicago: 26th out of 50.
07. Boston: 28th out of 50.
08. Seattle: 36th out of 50.
09. Dallas: 40th out of 50.
10. Mexico City: 41st out of 50.
Austria:
01. New York: 2nd out of 50.
02. Los Angeles: 9th out of 50.
03. San Francisco: 15th out of 50.
04. Chicago: 18th out of 50.
05. Toronto: 23rd out of 50.
06. Boston: 24th out of 50.
07. Mexico City: 25th out of 50.
08. Dallas: 28th out of 50.
09. Vancouver: 30th out of 50.
10. Seattle: 33rd out of 50.
Canada:
01. Toronto: 1st out of 50.
02. New York: 2nd out of 50.
03. Vancouver: 3rd out of 50.
04. Los Angeles: 6th out of 50.
05. San Francisco: 9th out of 50.
06. Boston: 11th out of 50.
07. Chicago: 15th out of 50.
08. Seattle: 17th out of 50.
09. Mexico City: 28th out of 50.
10. Dallas: 29th out of 50.
China:
01. New York: 6th out of 50.
02. Los Angeles: 12th out of 50.
03. San Francisco: 14th out of 50.
04. Chicago: 17th out of 50.
05. Vancouver: 21st out of 50.
06. Toronto: 23rd out of 50.
07. Seattle: 25th out of 50.
08. Mexico City: 29th out of 50.
09. Boston: 30th out of 50.
10. Dallas: 49th out of 50.
Egypt:
01. New York: 2nd out of 50.
02. Los Angeles: 13th out of 50.
03. San Francisco: 15th out of 50.
04. Chicago: 27th out of 50.
05. Boston: 28th out of 50.
06. Mexico City: 34th out of 50.
07. Toronto: 37th out of 50.
08. Dallas: 38th out of 50.
09. Seattle: 41st out of 50.
10. Vancouver: 47th out of 50.
France:
01. New York: 3rd out of 50.
02. Los Angeles: 13th out of 50.
03. San Francisco: 17th out of 50.
04. Toronto: 26th out of 50.
05. Chicago: 28th out of 50.
06. Boston: 30th out of 50.
07. Vancouver: 32nd out of 50.
08. Seattle: 41st out of 50.
09. Mexico City: 42nd out of 50.
10. Dallas: 43rd out of 50.
Germany:
01. New York: 5th out of 50.
02. Los Angeles: 11th out of 50.
03. San Francisco: 13th out of 50.
04. Vancouver: 35th out of 50.
05. Toronto: 32nd out of 50.
06. Chicago: 33rd out of 50.
07. Boston: 40th out of 50.
08. Seattle: 43rd out of 50.
09. Dallas: 44th out of 50.
10. Mexico City: 45th out of 50.
India:
01. New York: 4th out of 50.
02. Los Angeles: 8th out of 50.
03. Chicago: 14th out of 50.
04. San Francisco: 16th out of 50.
05. Mexico City: 22nd out of 50.
06. Toronto: 23rd out of 50.
07. Boston: 24th out of 50.
08. Dallas: 33rd out of 50.
09. Vancouver: 39th out of 50.
10. Seattle: 40th out of 50.
Italy:
01. New York: 6th out of 50.
02. Los Angeles: 14th out of 50.
03. San Francisco: 17th out of 50.
04. Chicago: 23rd out of 50.
05. Boston: 27th out of 50.
06. Toronto: 30th out of 50.
07. Seattle: 33rd out of 50.
08. Dallas: 41st out of 50.
09. Vancouver: 44th out of 50.
10. Mexico City: 46th out of 50.
Japan:
01. New York: 2nd out of 50.
02. Los Angeles: 6th out of 50.
03. San Francisco: 8th out of 50.
04. Chicago: 18th out of 50.
05. Boston: 19th out of 50.
06. Seattle: 22nd out of 50.
07. Vancouver: 25th out of 50.
08. Toronto: 30th out of 50.
09. Mexico City: 39th out of 50.
10. Dallas: 40th out of 50.
Mexico:
01. Mexico City: 1st out of 50.
02. New York: 3rd out of 50.
03. Los Angeles: 7th out of 50.
04. San Francisco: 11th out of 50.
05. Chicago: 14th out of 50.
06. Toronto: 17th out of 50.
07. Vancouver: 19th out of 50.
08. Dallas: 21st out of 50.
09. Boston: 26th out of 50.
10. Seattle: 29th out of 50.
Netherlands:
01. New York: 7th out of 50.
02. Los Angeles: 15th out of 50.
03. San Francisco: 22nd out of 50.
04. Chicago: 32nd out of 50.
05. Toronto: 34th out of 50.
06. Vancouver: 40th out of 50.
07. Boston: 41st out of 50.
08. Seattle: 44th out of 50.
09. Dallas: 45th out of 50.
10. Mexico City: 46th out of 50.
Poland:
01. New York: 8th out of 50.
02. Los Angeles: 15th out of 50.
03. Chicago: 26th out of 50.
04. San Francisco: 28th out of 50.
05. Toronto: 30th out of 50.
06. Boston: 40th out of 50.
07. Vancouver: 42nd out of 50.
08. Seattle: 44th out of 50.
09. Dallas: 45th out of 50.
10. Mexico City: 47th out of 50.
Russia:
01. New York: 7th out of 50.
02. Los Angeles: 16th out of 50.
03. San Francisco: 24th out of 50.
04. Chicago: 33rd out of 50.
05. Toronto: 34th out of 50.
06. Boston: 38th out of 50.
07. Seattle: 40th out of 50.
08. Mexico City: 42nd out of 50.
09. Vancouver: 43rd out of 50.
10. Dallas: 45th out of 50.
South Africa:
01. New York: 3rd out of 50.
02. Los Angeles: 8th out of 50.
03. Chicago: 17th out of 50.
04. San Francisco: 18th out of 50.
05. Boston: 25th out of 50.
06. Toronto: 28th out of 50.
07. Mexico City: 31st out of 50.
08. Dallas: 32nd out of 50.
09. Seattle: 33rd out of 50.
10. Vancouver: 41st out of 50.
South Korea:
01. New York: 2nd out of 50.
02. Los Angeles: 7th out of 50.
03. San Francisco: 14th out of 50.
04. Chicago: 16th out of 50.
05. Vancouver: 20th out of 50.
06. Boston: 23rd out of 50.
07. Seattle: 24th out of 50.
08. Toronto: 28th out of 50.
09. Mexico City: 30th out of 50.
10. Dallas: 44th out of 50.
Spain:
01. New York: 6th out of 50.
02. Los Angeles: 13th out of 50.
03. San Francisco: 18th out of 50.
04. Chicago: 30th out of 50.
05. Boston: 31st out of 50.
06. Toronto: 33rd out of 50.
07. Seattle: 42nd out of 50.
08. Dallas: 43rd out of 50.
09. Mexico City: 44th out of 50.
10. Vancouver: 45th out of 50.
Sweden:
01. New York: 4th out of 50.
02. Los Angeles: 11th out of 50.
03. San Francisco: 15th out of 50.
04. Chicago: 30th out of 50.
05. Boston: 34th out of 50.
06. Toronto: 39th out of 50.
07. Dallas: 40th out of 50.
08. Seattle: 41st out of 50.
09. Vancouver: 43rd out of 50.
10. Mexico City: 46th out of 50.
Turkey:
01. New York: 3rd out of 50.
02. Los Angeles: 13th out of 50.
03. San Francisco: 20th out of 50.
04. Chicago: 23rd out of 50.
05. Boston: 28th out of 50.
06. Mexico City: 36th out of 50.
07. Toronto: 38th out of 50.
08. Dallas: 40th out of 50.
09. Seattle: 46th out of 50.
10. Vancouver: 48th out of 50.
United Kingdom:
01. New York: 4th out of 50.
02. Los Angeles: 13th out of 50.
03. San Francisco: 21st out of 50.
04. Toronto: 25th out of 50.
05. Chicago: 28th out of 50.
06. Boston: 29th out of 50.
07. Vancouver: 30th out of 50.
08. Seattle: 35th out of 50.
09. Dallas: 39th out of 50.
10. Mexico City: 43rd out of 50.
United States:
01. New York: 1st out of 50.
02. Chicago: 3rd out of 50.
03. San Francisco: 4th out of 50.
04. Los Angeles: 5th out of 50.
05. Boston: 6th out of 50.
06. Seattle: 8th out of 50.
07. Dallas: 9th out of 50.
08. Toronto: 13th out of 50.
09. Vancouver: 20th out of 50.
10. Mexico City: 33rd out of 50.
Here is the most recent 2015 update to his city brand index research, he no longer details each country and the specifics but does have a top 10 list overall. The following are the American cities in that Top 10.
Best reputations/most admired globally in 2015, the Top 10:
03. New York
05. Los Angeles
10. Washington D.C.
Paris wins back