These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Halo: Contact Harvest
Moral Event Horizon: Johnson feels that he's crossed it during the years fighting the Insurrection. Maccabeus feels that he would cross it by destroying Harvest and all its relics. Loki, however, crosses it when he deletes Sif to prevent her from falling into Covenant hands, after promising Mack he'd protect her.
The Woobie: By the end of this book, you will want to hug Mack. And Sif. And Dadab. And Lighter than Some. And Johnson. And maybe Jenkins.