Do you actually have an EU Blue Card Visa, i.e. does the stamp say EU Blaue Karte? Check what type of visa you had received. It is possible that you have a §4 BeschV type visa meant for managers and specialists (colloquially called Specialist Visa). This is typically what they issue to IT specialists with no university diploma or diploma that isn't directly ...
I came across something curious:
The European Union Blue Card directive applies to highly qualified
non-EU nationals seeking to be admitted to the territory of a Member
State of the European Union (common European Union immigration
policy), excluding Denmark, Ireland and the United Kingdom, for more
than three months for the purposes of employment ...
My answer probably comes too late, but still might contain useful info for people in similar situations.
From my understanding, registering your marriage in Germany is not a problem at all. After the question was asked, the same-sex marriage became completely legal in Germany.
The problem is to apply for a residence permit (which starts with application ...
Added information from Comments:
not self employed (Selbständig) or freelancer
§19a (6) Sentence 1
Niederlassungserlaubnis issued against a Blue Card
I believe this card was incorrectly issued due to the added
date restriction and the extra text about expiration
You should probably inform them of this and ask for the issuance of a new card.
Responding to the title of your question: if you obtain permanent residency in another country, you'll always be a visitor - a tolerated, long-term visitor to be sure, but not a citizen. Your passport will be that of your country of origin, and you may face challenges when it's time to renew it. (If you can achieve permanent residency, as @phoog notes in ...