I know one of the YNAB tenets is that there is no "normal" month, so every month's budget is going to be a little different. I like that -- in Quicken, we usually get to the end of the month and have to pull up calc to total what we have left in various categories to know what we have left to get through the month. This way, we're freer to adjust the category budgets themselves.
In our case, my income is very regular while my wife's is extremely variable. We have a set budget for my money that doesn't change much month-to-month, and the money she makes fills in any gaps. I'd love to be able to start a month with our "usual" budget for my money filled in, and her earnings "Available to Budget" so we can allocate them.
Instead, we apparently have to either start from scratch or carry forward last month's allocations of her budget. Quick budget copies what was done last month, which by definition was changed in response to things that happened last month. I know there's a common workaround, Quick Budgeting the "normal" ahead a month before you make your first change to this month's budget. However, that's a fragile process -- forget it once, and you've lost it. Also, it makes YNAB complain about "over-budgeting" since you've now got a budget in a month with no income.
I'd love to see a "starting budget" or "par budget" option in the Quick Budget menu. Just give me the option to snapshot the current month, and the option to apply that snapshot in any future month. (Editing the snapshot would be nice, too, but that's a lower priority since I can apply, edit, and take a new snapshot.)