Interesting post even though I'd admit that I'm not a huge fan of "I'd watch it again". For instance, some movies are really hard (huge drama, etc.), or particularly long, or even have a huge punch at the end. These movies would have a "rewatchability" really poor.
One might also watch a very simple movie.. nothing extraordinary that you wouldn't necessarily watch again; that doesn't mean it's not a good movie to watch for the first time.
Personally, I think the best factor to "guess" if I would watch a movie would be to anonymously analyse a huge set of data and find people who like the same stuff as I do. So, he likes x,y,z (as I do) and hate a,b,c as I do, good.. we mostly like the same stuff. Now, he really enjoyed K; I'd probably also like it.
One might also watch a very simple movie.. nothing extraordinary that you wouldn't necessarily watch again; that doesn't mean it's not a good movie to watch for the first time.
Personally, I think the best factor to "guess" if I would watch a movie would be to anonymously analyse a huge set of data and find people who like the same stuff as I do. So, he likes x,y,z (as I do) and hate a,b,c as I do, good.. we mostly like the same stuff. Now, he really enjoyed K; I'd probably also like it.