I went with Bella, though not for sexual reasons. I mean that was sort of there too, but my interpretation of her relationship with the MC tends to lean more to an almost surrogate mother sort of situation happening there. I'm actually not super interested in Bella as a love interest, but those personal moments between her and the MC are great.
Bella's path has the most poignant story and the emotional tone fits what just happened to the MC. Derek's is light comedy and does little to further the story. And the Sage path is the least story driven, and the most dry emotionally, but some interesting character building scenes with the Hots. Each of them have their own unique lewd scenes obtainable only by taking that path.
I like the Bella path for purely storytelling reasons.
In the movie:
Being a DIK: The Motion Picture, the script will follow the Bella path because it's the most emotional and dramatic with several "Oscar moments" for good actors. Besides it sets up the action packed sequel:
Being a DIK: The Wrath of Bella! The the last of the trilogy will be a turd (they usually are) when
Being a DIK: The Emancipation of Quinn is released.