Of course I'm going to be the fastest man to ever travel in space, because they're sending me up in a convertible.
I still place no blame on my crew for leaving me.
Mark has a awesome sense of humor and even cracks jokes in the face of death.He uses that sense of humor to help keep his life a little better so he does not become depressed.
He is very forgiving toward others, you can see this throughout the book as he still refuses to place blame on his crew for leaving him on Mars.Just from that you can see that he is a very nice and forgiving person.
He takes family first even when he is on Mars, he spent a lot of time emailing his mom with the Pathfinder.He also missed his mom all over the book like when on thanks giving he expressed how much he missed her and his family.