Which flags do you think have the best design?

[Heinrich Elisa]

I like the flags of Bhutan, the US, Wales, Panama, and Greece.

[Barclamïu da Miéletz]

Poland.

[Miestră Schivă, UrN-GC]

Poland.

Runners up: Indonesia and Monaco

[Barclamïu da Miéletz]

Poland.

Runners up: Indonesia and Monaco

They just stole from us.

[Françal I. Lux]

Hong Kong, Barbados, Montenegro and Mexico

[Breneir Tzaracomprada]

South Africa, Brazil, India, Thailand, United Kingdom, The Bahamas, Japan, United Nations

[Heinrich Elisa]

Hong Kong, Barbados, Montenegro and Mexico

the Barbados flag is beautiful

[Heinrich Elisa]

South Africa, Brazil, India, Thailand, United Kingdom, The Bahamas, Japan, United Nations

good options

[Yasuhito Nakasato]

I like the design of the flags of Mexico and Brazil.

[Mic’haglh Autófil, O.Be]

Assuming we're sticking with national flags of current states, in no particular order:

Switzerland, Finland, The Bahamas, San Marino, Czech Republic, The Gambia

There are others I like due to specific shades used, but the design itself is not particularly notable (Luxembourg and Sierra Leone come to mind)