Chris Hemsworth said working with Thor: Ragnarok director Taika Waititi was “liberating and freeing” and allowed him to break away from “who the character was prior
.”
In an interview with Yahoo Movies UK, Hemsworth said that while he enjoyed working on Thor: The Dark World, he enjoyed it “nowhere near as much” as making Ragnarok, and was more comfortable in what he wanted to do with the character.
Hemsworth explained that “tonally, we never quite landed on what
should have been. It became a little too – I don’t want to say serious, but as I was shooting it, I desperately wanted to do something more fun with the character and unexpected.
Source: IGN.com Chris Hemsworth Was Exhausted, Underwhelmed With Thor Before Ragnarok