1) Aww, poor Kaylee. She takes it the hardest of them all (or, well, shows it the most) when someone leaves, doesn't she? I also think you nailed the Kaylee/River dynamic here; Kaylee is affectionate towards her, but wary at the same time.

2) ...Jayne using the snap of his protein sticks to annoy Simon over the table.

Hee! That is such a Jayne thing to do. I also like how he's used as a barometer for how the crew is doing.

3) Oh, God, this one is perfect! "For the adventure!" is just so perfectly Wash. *hugs him and his adorable self* And Kaylee having the initiative is so like her; she's so very down-to-earth and practical, and Jayne's hunger overcoming, hahaha. And Inara's secret salad stash! You really nailed everything I love about their group interactions in this one :D

4) LOL. Rice crackers for the win. And Zoe's line at the end, *grins*. I also love Book's voice in this one; very spot-on. You captured his easy calm confidence very nicely.

5) *melts into a happy puddle* Aaaaaah, you write the ensemble so well. I knew you'd do great things with this prompt. *loveslovesloves* I just loves me a big happy Firefly family. :D