Except for maybe Raymond,
, but he was playing 'raymond' as 'Raymond' so it worked just fine.
My favorite was "Marie", played by Doris Roberts. She had that role down to perfection.
One of the things I take notice of with Actors is how different, or alike, they are being themselves and in the roles they play. In this regard Brad Garrett, as Robert, was remarkable. As himself nothing even close to the character "Robert".
Most actors, nearly all of them, bring over certain mannerism's when playing a role.. but Brad truly became a different character.