Good to hear. I agree with your points.
And yes, Adriana always struck me as the good, well-behaved girl that can seem borderline-boring, especially to a guy like Marko. Nina Moric seems like Adriana's opposite. She seems like a less classy but much more outgoing and wild girl. In other words, Adriana is the devout Catholic that prefers to stay at home and watch Brazilian soap TV and Nina is the wild nymphomaniac that would rather party the night away - whether it's in the club or in the bed. Marko is the type of guy who wants the good well-behaved girl as wife, but still can't let go of the wild chick for a bit of "fun time". A trophy hunter. A panty diver. A... you get the idea.
Adriana, unfortunately, seems attracted to that type of a guy. Kravitz, Denny, Marko. Those are the type of guys who just can't stay away from other women to save their lives.
Of course, I don't know any of them personally so take my analysis for what it is. This is just what it looks to me from afar.