Which national flag do you like most ?(except your country)

[Salnax]

First, I should note that my preferences for a flag are for them to be a compromise between having relatively simple designs and being memorable. So a lot of flags that other people like don't tickle my fancy,

This is the Republic of Congo's flag. I like how this is one of the relatively few countries that goes for the "Diagonal Tricolor" look. I also appreciate the color choices. Red, Yellow, and Green are striking color, each have a symbolic reason to be there (Green Forests, Yellow Friendship, and Red for their period aas a Communist country), and together represent the Pan-African movement.