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First of all I think they are pretty good :)
I like the first one and the fifth one. Those are a little more subtle then the other ones and imo you did well on the color scheme aswell. However if there is a place for criticism (and since we're all perfectionists i hope there is)

id would be the choice of color in the other ones. Especially if it comes to readability (eg the "ZU is you). There is a great YouTube channel that has great videos on that if you're interested:

Thank you @lumpi, I will take into consideration !