Legal Question in Civil Litigation in California

Arguably, yes. It wouldn't be valid service of a summons, but there is another statute that refers to "personal delivery" to your home. You are obviously representing yourself.

"The service may be personal, by delivery to the party or attorney on whom the service is required to be made ..." (Code of Civ. Proc., sect. 1011.)

You could argue that the papers were not left with someone, but there is case law that states your refusal to accept the papers cannot be used to prevent lawful service. If I were the attorney litigating against you, I would just get a court order to have the sheriff kick down your door, and serve you inside your house because you refuse to accept normal service while representing yourself.