Since I quite like being counter-productive, the 'free-form' chapters rank higher for me:
Chapters
Dan > Stephanie > Chris > Harrison > Seymour
Dan's chapter felt like the most fleshed-out section and, deus ex machina aside, let us do the most. Stephanie and Chris let us make things from loaves of bread, but Stephanie's hilarious writing edges it. I'm still angry about that damn vent in Harrison's story, so he gets marked down through sheer saltiness. Seymour's I didn't play much, basically.
Characters
Harrison > Stephanie > Dan > Seymour > Chris
Harrison is amazing. Poor Stephanie is so fun to push into the mud. Dan's gimmick was entertaining. Seymour does his own thing. It seems unfair to rank Chris, since he was probably intentionally a blank slate.
... so, any guesses on what's going to happen? Seems like there'll be Grue Battles, but the most destructive weapon a character has so far is a basketball (unless Harrison kept an extinguisher, I can't remember), so perhaps not.
And how are we supposed to look in cisterns with Grues about!?
--
I won through basic physics; face conducts fist.