Tier List of American State Flags

 

So, this is a tier list. Alabama Texas Colorado and Indiana get special recognition. No flaws here.

Second tier is very decent as well, not Nation level but good for a state. That is something you can fly proudly. 

Third tier has issues and can be improved, but in many cases has good ideas. Two exceptions are: Utah is there because I do not like beehives and New Hampshire because I like sail ships and it's best of seal on blue.

Forth tier is average, they look poorly but distinctive enough for you to not mistake them for another state. Both Florida and North Carolina toon good designs from Top tier and made them worse.

Fifth tier is SoB with some redeeming qualities, such as clearly readable image on seal or CoA or wide CoA with supporters that make it somewhat distinguishable from the rest.

Six tier is complete failure. Most of it is just colored dish that is indistinguishable from colored dish next to it. It's a bad design if you have to spell name on it in huge fort to help people tell it apart from others, might as well forgo the seal and just keep the name. Some managed to get even worse than that by making the design smaller and putting it in the corner so it's even harder to tell it apart from a plain blue sheet.