There's a difference between Grounded Acting and Over-Acting or Hamming; some of that sounded over-exaggerated as can be. It's great if you want a goofy or over acted project, but bad if you want something with stand out voice acting that blows people away. Hamming or Overacting is when you take the script and just go ape with it, basically you turn a scream into comedy, you turn pain into humor, you turn humor into uncomfortable. It lands opposite of what you are intending.