Classic: (
Style) Older anime titles, from the 80's back. As a rule of thumb, a title should at least be 10-years old.
Shounen: (
Target Group) (
↗shounen (
少年) = "boy", "juvenile"; opposite of "
Shoujo") A demographic of manga readers (generally considered 10 to 16 years of age). Refers to anime based on manga that was originally serialized in a magazine targeting boys of any age. See also:
↗Wikipedia:Shounen.
Tragedy: (
Genre) Animes of this type have tragic events as an important part of the story, and usually will show how the characters are dealing with the consequences of that tragedy (more or less successfully). This doesn't necessarily mean the story cannot have a happy ending as the tragedy might occur during the first episodes of even before story begins; as such this category information need not be a spoiler (unless the tragedy were to be a surprise for the audience in a mystery-style show).