How do you get to be an 'expert' in what's a good film/book/song/play? It's entertainment, if it entertains people it's good, if it doesn't it isn't. You can make a (poor) argument that if it entertains more people it's 'better', but you an 'expert's aesthetic judgement is exactly as subjective as anyone else's.
If you like it it's good FOR YOU, there is no absolute 'good' or 'bad' in art. Except Tracey Emin, of course, that's just pretentious shite.
O.