'my own personal experience' is a correct phrase that is usable in written English. You can use it to describe a specific experience you have had or to emphasize the significance of a particular experience. For example: "Through my own personal experience, I have learned the importance of discipline and hard work.".
"My own personal experience couldn't be further away from these women's.
My own personal experience — I found I was interested in being in a lab, turning wrenches.
My own personal experience says that the guy with the biggest S.E.O.
"It's just that my legends are ones that are based on my own personal experience".
My own personal experience has caused me to conclude just the opposite".
You see, I can tell, from my own personal experience, almost exactly where the coyote is standing.
"It was my own personal experience that made me go and speak to the commissioner that day.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union