I liked this series very much. I was in awe of the technical writing and found the plots likeable. I read Red Mars, Green Mars, and Blue Mars together and the further I got the more annoyed I became with the female characterizations. Robinson is clearly better at writing about men. His male characters have such depth and are intriguing. The female characters are either mentally unbalanced, sex addicted, jealous, petty or incomplete with lack of description. The males have such interesting relationships with each other, but I can't think of any females in any of the books who are even friendly with each other. I liked this series very much and loved the men characters, but the books would have been much better with more rounded female characters.