Separate accounts, but not just trust issues.
You see, I'm the male, but not the breadwinner. My wife makes double my salary. When we started out, I was paying our mortgage and rent for the apartment we had in another city where she went to grad school. I stayed with her weekends, etc... When she got her job, her number one priority was to pay off her $90k of college debt ASAP. So she focused on that and her reward was buying a brand new SUV when she finished paying off her loans....then her reward was becoming the mother of my kids. All the while, I concentrated on paying on the house and household expenses.
After kids were born, she's been paying 1. retirement catch up 2. day care costs 3. 529 (college fund contributions) and most-importantly 4. vacation funding
She's also taken on some construction loan payments on our house and is paying on a minivan we bought. My point is, we have split accounts, but we manage our own pools of money and both are concentrating on paying down debt and saving at a crazy rate....while going on vacations and enjoying life as much as we can while being really responsible with the stuff that counts.
I'm hoping we'll have our house paid off in 5 years time. I know we'll definitely have our short term loans zapped by then...only 1.25 years of day care payments left...then things will get cheaper. At one point, we were paying $1400/month in day care. Now it's closer to $850 I won't mind combining our accounts after we get things paid off. For now, I like having them separated because we get paid on different schedules and some months, I lock my spending to compensate for seasonal expenses. (timeshare maintenance fees, NFL season tickets, etc...)