Ever since we first started going on holidays together, we've had "joint money" alongside our own accounts etc. Works well for us. At first, we had a joint "wallet" on holidays, where we both put the same amount in, and used it to spend on things we did together, such as attraction entry fees, meals, etc - we still used our own purses/wallets for things we bought separately such as souvenirs etc where we were paying different amounts for what we were buying.
It worked well, so we used the same idea when we bought our house and got married, i.e. a joint bank account for the household, alongside our independent private accounts. Our wages etc went into our own private accounts and then we each set up standing orders to pay an agreed amount each into the joint account (different as we earned different amounts, so we made it proportional to our earnings). All household costs came out of the joint account, i.e. holidays, utilities, food, house repairs, etc. We used our own accounts for presents, personal hobbies, etc. We also had joint and individual savings/investment accounts.
After 20 years of marriage, we're still doing the same, we have bank accounts and savings/investments in our own names, and also in joint names. We've tweaked things over the years so that our separate savings/investments/pensions etc are roughly equal to maximise tax reliefs/exemptions, etc. We barely use our individual accounts at all, just for presents really, and nearly everything else goes through the joint accounts.