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.
Primal Fear: Loads: claustrophobia AND agoraphobia, fear of the dark, sense-loss (by wearing thick blinded space-suits), asphyxiation (especially by choking on your own fumes).
Squick: Solo's living conditions. For example, the toilets have stopped flushing in his Silo, so since Solo's the only one around, he just uses a bathroom until it gets disgusting before moving to another.
The Woobie: Solo, who is 50 years old and has been alone since he's been 16. Mentally, he's still a (smart, shy, kind) little kid.