The Martian // Andy Weir.
Ever since Ender’s Game by Orson Scott Card, I have tasted the ecstasy of sci-fi novels. However, Weir’s The Martian tasted like unriped bananas. The knowledge of science Weir displays has no lack, but his choice for (annoying, immature, and lame) comical tone devalued my experience with Mark Watney. Furthermore, all the other characters devolved into the same persona: someone who wants to make a quick joke of the situation.
Others have defended the tone of the novel by saying that it is actually funny and/or actual rocket scientists talk like that. I still stand by my judgment — the comedy was poorly executed.