He wanted more unpredictability, which he got when he left the Navy and became a privateer. He began to help on explorations with random people rather than a government entity, and that helped make things a bit more fun, but it still was basically the same thing as before.
Hate to be picky, but a privateer works under the marque of a government, and would be working as a raider. Sounds more like he was a freebooter or a rogue trader by the description you've given of his activities.
Quotes:
"What can I say; shit happens."
"Hold your horses! Fixing a plasma rifle takes time, and if I'm not careful it can blow us all up."
"Well, that's a thing."
Why do I get the impression there should be a 'BOOM' between the second and third quote? :P
@SimplyJohn I may have missed something here, but where's your character??
I'm not playing a specific character, but acting as an overall narrator and speaking for various NPCs you may run into. More a hands off GM role than a participant.

I'll see what