Mark Watney displays incredible character traits throughout the book including that of resiliency but even more impressively his ability to maintain his sanity. Although some may argue that he went slightly mad towards the end of the book when he had to ration his meals, but I mean before that. Prior to this he was completely alone in space and was able to keep his cool. In addition to the potential onset of loneliness, Watney was also faced with absurd challenges such as being able to produce his own food on a planet without water. He was able to devise a system that kept an area of the space station humid enough to support plant life. In fact, Watney was only able to survive as long as he had due to his incredible botany experiment. Had any other man or woman been stranded on the station I believe the outcome would have been far different. It was due to his incredible set of botany and scientific skills and knowledge that allowed him to not only survive but practically thrive (as far as living on an uninhabited planet goes) on his own.
In addition to his unparalleled resiliency, Watney’s satirical and sarcastic sense of humor definitely helped him maintain his sanity, which played a major role in his ability to perpetuate life. As I said before, Watney’s scientific and botany abilities are a huge part of why he was able to survive, but even if someone with the same capabilities as Watney had been there the story could have ended differently. Watney was able to keep a good sense of humor and light mood which allowed him to make calm and calculated decisions.