Genre.

I have chosen the genre of arthouse!

"An art film is typically a serious, noncommercial, non-pornographic, independently made film aimed at a niche audience rather than a mass audience." Wickipedia 17.05.10

"Film critics and film studies scholars typically define an 'art film' as a '...canon of films and those formal qualities that mark them as different from mainstream Hollywood films' which includes, among other elements: a social realiserm style; an emphasis on the authorial expressivity of the director; and a focus on the thoughts and dreams of characters, rather than presenting a clear, goal-driven story. " Wickipedia 17.05.10

"Art-house films tend to be emotional works in which the main characters have unclear motives. After watching one of these films, many viewers are left emotionally drained from the roller coaster of feelings they have just experienced." Ehow article 17.05.10

From these quotes and reserach I have discovered that art house is a genre in its own right, therefore has no sub-genres. This really suits my ideas at the moment as the genre gives me the chance to be experimental with them, as it follows no conventions.