Summary: Dynasty Warriors 5 is the best game in the main series. Rather than each character that you pick playing through the entire story of their kingdom, this game has every character play through their own battles. In addition, since they have their individual campaigns, some of them have a special battle that is unique to their story. For example, Guan Yu has a battle that no other character can play where he escapes from Cao Cao with Liu Bei's wife.
Summary: The Dynasty Warriors series has always been a fun game around the idea of a single soldier mowing down hundred (even thousands) of soldiers on the battlefield. The games offer great stress relief and are fairly simple in design, but that does keep them from being fun. While looked at as a series, little advancement was made in the early entries (this one included,) but from a stand alone perspective it is a decent game.