Family of 3: me, DH and DD (4).
Not much. However, we're debt free and have a small pot of savings but renting after having to sell to put ourselves back on track after DH lost his job. I'm a freelancer which, fortunately, pays very well in my field. I generally work 3 days per week, mostly term time with the odd bit of writing during holidays.
Due to the fact that we don't ever again want to feel the pressure that debt brings, we view as much income as possible, after all bills, food, travel and petrol has been paid for, as Money To Be Saved. So, no massive holidays etc. But we don't go without treats like wine, fancy handcream (me!), DD's ballet lessons and nights out when we can grab them.
If and when DH returns to work (has been SAHD for past couple of years) then whatever he earns, less travel and wraparound childcare, will be disposable but will be ploughed into savings for a deposit. For now though, we are very lucky to have all that we need without either of us being worked into the ground.
So, after the epic tome I've just penned: a little disposable income but more free time than I've ever had in my career.