I've seen a few Hallmark Christmas movies, specifically the kind that come in those 4-for-1 boxes that get sold around the holidays. What shocks me every year is how consistent the movies are despite not obviously sharing any crew members.
The directors, lead producers, actors, and obvious camera operators are all different between the movies, and yet they all share a ton of broad similarities. Very similar music cues, lighting, cinematography, stories, character quirks, and an incredible ability to be completely and totally inoffensive at all times across dozens of movies.
From what I can tell from some IMDB surfing, many directors appear to be low-to-mid made-for-TV directors that get contracted for multiple Hallmark movies at a time. Graeme Campbell, for example, has four Hallmark movies to her credit from 2013 to 2016 after working almost exclusively on television murder mysteries. Ron Oliver has spurts of a few Hallmark movies punctuated by direct-to-video sequels to 90's comedies. Peter Sullivan seems to waffle between Hallmark contracts and cheap horror movies and teen skin flicks. I've had the pleasure of watching Broadcasting Christmas, you would never expect it came from the same guy in charge of High School Posession and Cucuy: The Boogeyman.
Same basic (lack of a) pattern seems to manifest for the camera operators, writers, and producers.
How do these movies end up coming out so similar? I presume there's some kind of studio input that prevents things from going too far off the rails, but given that the movies are similar even down to their basic plot structure, there must be way more control over the projects than just the usual Hollywood rewrites.