Subjectively, every author has their own favorite subject that he or she knows a lot about, and which it is easy for him or her to write about. Someone might have a rich imagination but have completely no talent for creating interesting stories, so the easiest part for such a writer would be describing appearances, sights, interiors, and so on, but the plot would be boring. Another writer might be keen on psychology, so creating motivation for characters and analyzing their thinking processes would not be a problem for him or her; however, for such writers, it might be difficult to make their story more dynamic and vivid. On the other hand, however, objectively one of the most complicated parts of writing is composing dialogues; for some reason, people write in a manner sometimes totally different from their usual speaking one. As a result, dialogues in the novels by amateur writers often sound crude and unnatural; another typical mistake is expressing everything a character thinks about through a dialogue. Apart from dialogues, making a plot wholesome and logical, and fixing all the inconsistencies that are present in the text is also a challenging task.