Favorites: Smith, Kai bros, Hakuro, Mutsu generals, Jinnai and Kirikaze, Gin, Riki, Wilson, Moss (he's so sweet though!), John, Ben, Cross (the only female!), Kurojaki, and Shinji (that annoying kid in the beginning with the buck teeth). So pretty much them all.
Least Favorites: I don't really dislike any characters, but I feel like Benizakura, Bemu, Terry, Oliver, Gin's wimpy siblings, Bill, and Jaguar could have had WAY more involvement.