I am not the jealous type. And that's exactly it, no one holds a queen in a crystal cage.
I did like you, I don't remember exactly where I qualified, but it was certainly from neutral to DIK. Chick is very boring. For me, it's only good when you're trying to follow girls on this side, like Maya, Jill ... I'd say Bella, but you can do very well with her being DIK too.
About your final question, just do one full DIK and one full Chick, you will open the full scenes.
Now, I advise you to use this.
Walkthrough Mod
It also ends the money issue.