Perhaps the most misused and incorrect phrase, in any language, is:
"It's my 'PERSONAL OPINION" that.........................
"Excuse me! But, if it is YOUR opinion, doesn't that automatically make it 'PERSONAL.'
Just try saying, It's "MY OPINION."
richard riddle: 05-14-2016
My wife, Karen, was a bit of a 'grammer officionado', being a writer herself. She would cringe whenever she heard someone say that phrase. We all do, have, and will continue to do so. Think about it, and you'll see the reasoning.