Seriously, if you haven't read the Murderbot series by Martha Wells, you're missing out. The first novella is called All Systems Red, and it's a gem. There are four novellas and a novel out that are all excellent, and she has another novella coming out at the end of the month! Yay! (I pre-ordered mine in October) I may have read this entire series at least six times in the last year...
Murderbot is a Security Unit (SecUnit) for a company that leases it as cargo/supply to endeavors that might need security, like mining operations or exploration. It is made of both robotic parts and cloned human tissue. The story begins on a survey mission on an uninhabited world. Murderbot is the sole SecUnit for a team of scientists from an unaffiliated world (meaning non-corporation owned) called Preservation Alliance.
But Murderbot is no longer SecUnit standard--it has hacked its governor module. Meaning, that there is very little actual control anyone has over it because the governor module can no longer inflict pain or death if it disobeys. That said, all Murderbot wants to do is watch its shows, so it continues to fake being controlled so that it can download and watch media all day long.
Also, Murderbot doesn't really like interacting with humans and doesn't at all understand its own emotions--especially the ones that mean it might actually like the humans it's working with almost as much as the characters on The Rise and Fall of Sanctuary Moon. So when things start conspiring to harm its clients, Murderbot needs to do something about it.
Okay, that's as non-spoilery as I can get. Especially since all I want to do is gush about how much I love all the things about it. Of course all I want to do is give Murderbot a hug, but it would absolutely hate that... I have friends like that. If you do go read it, I think Ratthi is my favorite human in the series, but ART is my favorite person...well, other than Murderbot.
Anyway, the stories are amazing, and you should read them. Enjoy!