I am always interested in information, but most documentaries nowadays imply a narrator, usually some known actor or actress, who emotes in front of the camera while slowly saying boring things. Then you have whole seconds of some interviewee walking randomly on the street or stopping in front of the camera or other time wasting crap like that before you get to what is interesting. And that is if you are lucky and you don't get an outraged activist setting up scenes that would appear controversial while spouting angry and contradictory messages at you.
Not so Power of Grayskull! It is comprised almost exclusively from interviews with the people involved in the creation of He-Man and materials from the production. There is no narrator, no forced perspective, no one opinion shoved down your throat. It was amazingly refreshing. And yes, it is sad that I get so excited just because a documentary is well done and not blatantly sucking, but that's the market today, especially on Netflix.
I am sure the subject of the film is much more exciting for fans of He-Man, comic books in general or for collectors. For me it was interesting to see the history of the character, how it started and so on. Two things raised the level of the film: one is the quote that is being used in the beginning, something along the lines of "We were in the business of making things out of plastic and were completely taken aback when they sprung to life" - not an exact quote. The other one is Frank Langella's reminiscence of his role as Skeletor in Masters of the Universe. With his slightly angry, slightly bored, slightly annoyed calmness he recounted the whole thing in a few phrases that were just hilarious.
Bottom line: if you know who He-Man is or you are interested in a fascinating story of a character being organically created or you just want to see a documentary that is well done, this is the thing for you!
