|Saint Vincent and the Grenadines: Good effort for a country whose name sounds like a 50s rock'n'roll group.|
Spain: Spain had a civil war over whether to keep this flag. The wrong side won.
Libya: Did you even try?
Paraguay: Name of country written on the flag. Perhaps they have the excuse that their citizens can't remember the difference between Paraguay and Uruguay either.
Mozambique: Automatic weapons on a flag are especially bad. Appears to have been designed by a committee, all of whom had stupid ideas for pictures of extra things to put on the flag.
Marshall Islands: Looks like an airline logo.
Central African Republic: Do not attempt to disprove the four-colour theorem on your flag!
South Korea: Looks good on a t-shirt, not on a flag.
USA: If one is good, fifty must be great!
Saint Lucia: Best corporate logo. Makes me want to invest money there.