Are each X and each of the Xs interchangeable?
For example, in the following sentence, I would use each of the characters:
Each of the main characters is interesting.
But one could also write the following:
Each main character is interesting.
Instinctively, I prefer the former. Am I right, and if so, is there a written rule favouring the former sentence?
For what it's worth, Google returns 724,000 entries for each main character, and 11,600,000 results for each of the main characters.