My husband & I each have our own checking & savings. Pay is deposited to our respective checking account. We split expenses so each month, we each transfer equal mortgage & house-related funds into a joint checking account used just for this purpose. We split groceries and utilities, paid out of our individual accounts. We have a joint savings account, just for vacations and major "wants" like new furniture. Each month we each put in an equal amount.

This works nicely for us. We mingle money related to the household and vacations but nothing more. Never had an argument about spending.