Marriage and joined or separate accounts?

Hey married ladies!
Do you and your husband have joined or separate accounts or BOTH? Newly married over here and already arguing about finances.  I have my own separate checking and savings that I have saved my whole life. Plus we have a joined account with savings we saved together. He has his own checking/savings as well but he's spent all of it. He's not great with money. Which is mainly why I'd like to maintain my own separate savings as well as our joined savings. He thinks now we should just combine everything.  I don't agree... What are your thoughts and opinions? How do y'all do it?