Attackers, Madonna, Hibino, Tameike Gorō (溜池ゴロー), Moodyz, Glory Quest, Oppai, I-Energy, Sadistic Village, Erotica, SOD Create, Natural High, Nadeshiko, Takara Eizō (タカラ映像), Fitch - just to name a few (no special order).
And why? Because I like the content of their movies. I'm a fan of movies...