We didn't have an answer on the poll, so here goes:
We each keep 10% of our paycheck for our personal checking accounts. This is our weekly lunch money, personal splurges, etc.
The rest of our money goes into a join account, and we both decide what comes out of there and when. We divide that into our IRAs, savings, children's savings, x-mas account, groceries, bills, etc. This account will also cover miscelanous household things like oil changes, home repair, auto insurance, etc.
This works absolutely best for us as we both contribute to the household, but we each have our own "lunch" money as well.
Steph