There is probably not one "right" answer to this. Every person is different, and every couple is different.
When I got married, thirty years ago, we simply combined our finances and didn't think twice about it. We put our names jointly on everything. It was a decision based on mutual trust, but now I regret it.
AW always handled our finances, since she was an accountant. Unfortunately, as I've recently learned, letting an OCD Alcoholic handle the money is a HUGE mistake, accountant or not.