Wordcyclopedia | English | That's my personal opinion.

— (rare, nonstandard) whose, of which

— My things are things that belong to me. Is this my book, or is it yours?

— If something is personal, that means it is tied to you. When I die, I will give you my personal wealth. Don't make personal remarks.

— An opinion is a personal idea, a person’s thoughts on a topic. You gave your opinion of the case.