By saying you are a Micronationalist means you are NOT a fictional nation or a troll nation just for fun. It must have population. At least more than 3? Must have a flag (make sure it follows the flag rules) Land that isn't already another country or micronation's land. Most people do that though.. In-game nations are not okay if Micronationalism. Other micronations should realize you and have a proper flag that doesn't include: Text, Images, awful coloring, and awful angels.
Credits to @Xiyong for the flag idea! :D