Answer by taking a quote from the following article:

Sir Ridley Scott (born 30 November 1937) is an English film director and producer. Following his commercial breakthrough with the science-fiction horror film Alien (1979), further works include the neo-noir dystopian science fiction film Blade Runner, historical drama Gladiator (which won the Academy Award for Best Picture), and science fiction film The Martian. Scott's work has an atmospheric, highly concentrated visual style. Though his films range widely in setting and period, they frequently showcase memorable imagery of urban environments, whether 2nd century Rome (Gladiator), 12th century Jerusalem (Kingdom of Heaven), Medieval England (Robin Hood), contemporary Mogadishu (Black Hawk

Appearing in the lead role in Scott's Gladiator and Robin Hood, Russell Crowe commented, "I like being on Ridley's set because actors can perform [...] and the focus is on the performers." Paul M. Sammon, in his book Future Noir: The Making of Blade Runner, commented in an interview with Brmovie.com that Scott's relationship with his actors has improved considerably over the years. More recently during the filming of Scott's 2012 film, Prometheus, Charlize Theron praised the director's willingness to listen to suggestions from the cast for improvements in the way their characters are portrayed on screen. Theron worked alongside the writers and Scott to give more depth to her character during filming.  Scott's work is identified for its striking visuals, with heroines also a common theme. His visual style, incorporating a detailed approach to production design and innovative, atmospheric lighting, has been influential on a subsequent generation of filmmakers. Scott commonly uses slow pacing until the action sequences. Examples include Alien and Blade Runner; the LA Times critic Sheila Benson, for example, would call the latter "Blade Crawler" "because it's so damn slow". Another technique he employs is use of sound or music to build tension, as heard in Alien, with hissing steam, beeping computers and the noise of the machinery in the space ship. Scott claims to have an eidetic memory, which he says aids him in visualising and storyboarding the scenes in his films.  Scott has developed a method for filming intricate shots as swiftly as possible: "I like working, always, with a minimum of three cameras. [...] So those 50 set-ups [a day] might only be 25 set-ups except I'm covering in the set-up. So you're finished. I mean, if you take a little bit more time to prep on three cameras, or if it's a big stunt, eleven cameras, and - whilst it may take 45 minutes to set up - then when you're ready you say 'Action!', and you do three takes, two takes and is everybody happy? You say, 'Yeah, that's it.' So you move on."  Artificial intelligence is a unifying theme throughout Scott's career as a director, particularly in Blade Runner, Alien, and Prometheus. The recent book The Culture and Philosophy of Ridley Scott identifies Alan Turing and John Searle, a professor at the University of California, as presenting relevant models of testing artificial intelligence known as the Turing test and the Chinese Room Thought Experiment, respectively, in the chapter titled "What's Wrong with Building Replicants," which has been a recurring theme for many of Scott's films. The chapter titled "Artificial Intelligence in Blade Runner, Alien, and Prometheus," concludes by citing the writings of John Stuart Mill in the context of Scott's Nexus-6 Replicants in Blade Runner (Rutger Hauer), the android Ash (Ian Holm) in Alien, and the android David 8 (Michael Fassbender) in Prometheus, where Mill is applied to assert that measures and tests of intelligence must also assess actions and moral behaviour in androids to effectively address the themes which Scott explores in these films.

Were there others who commented about Scott's approach as a director/producer?
Russell Crowe commented, "I like being on Ridley's set because actors can perform [...] and the focus is on the performers."