Excellent post Macy, completely agree, even about Geoff/Nicole to a degree.
I think Nicole and Aden are more equal to one another in their 'relationship'. In Adelle, Belle always seems like the more mature one, especally if you ignore their constant drama and just look at them as normal characters. Aden is still very imature despite what's happened to him, he still gets in food fights, and gives soemone the silent treatment as punishment, Nicole, we all know, is the same. And yet thay both have the same level of bravery, seriousness and toughness when they need it. They're very much similar in personality, which is probably why they get along and fight as well as they do.
Neither Geoff and Belle are very compatible to either Nicole or Aden, I can buy Nicole/Geoff because that's supposed to be part of their appeal, no one's trying to deny their differences. Where as, with Adelle the writers have gone to a great trouble to make Aden and Belle seem like a perfect match, completely equal and mature together. It's essentially made Aden a different character with her compared to all the other characters and it's very jarring, I don't buy it.
Anyway, rant over.