Got a joint checking account on the day we got married, and tried to keep separate accounts on the side for "free" money that the other spouse couldn't complain about. Didn't work. Ended up with joint everything, but for the side account I keep to track child support spending.
This afternoon I'm going to the bank and separating our money again. He's aware, is sad but understands. We'll see if there's a massive fight about it tonight, but I don't think so.