style of the film has to do with its genre.
A film can be, for example, real-life, drama, comedy, fairytale
the viewers are well aware of various styles. After seeing
a few shots the viewer forms an idea of the style of the film
and draws conclusions about its genre. A style that changes
without motive is considered a mistake or a disturbance, and
the entire film is considered incoherent.
the other hand, a stylistic bouncing every now and then can
be used as a conscious effect. In that case this bouncing
can create a personal style for the film.