I'm super happy to share, but I'm not sure exactly what you're asking, but I'll address my assumptions individually:
When you ask what film I use, I assume you are asking what film I recommend that YOU should use.
If you mean what "format" film this camera uses, it takes 120 film, also known as Medium Format.
If you want a specific recommendation, I have worked out exposure times for a number of films, including FujiChrome Velvia, Kodak Ektar, FujiFilm Acros, the Provias... See the exposure charts for more information on tested film stocks.
If you're asking what film I, personally use, I shoot a lot of Velvia slide film, Kodak Ektar, and Ilford PanF+. These are my favorites, but you should eventually shoot enough film to decide which are your favorites!
Let me know if you have any questions about this.