Been married 21 yrs, eldest DC almost 20. Bought house together a few months before he was born, having sold both individual houses.
I have been PT since having kids, but I work just as hard as DH, doing all family admin, bulk of taxiing and sorting DC out, general childcare/school pick-ups etc when they were younger.
Opened joint account once we bought the house, and have had only joint accounts since. All money in, all bills out. I really find the 'splitting bills' concept hard to understand. We are a family unit, we have joint house, joint kids, etc, so why wouldn't all money be joint?
All savings are joint except for ISAs and pensions which have to be separate. Direct debits pay into ISAs each month, same amount.
We are lucky not to have to budget stringently, so both have credit cards and use them for personal spending as we wish (but we have similar attitudes to money, neither of us are massive spenders and we would agree big spends). Credit cards paid by DD from joint a/c, I keep an eye on them in case we need money moving back from savings eg one off car bills.