Three kids who'd be 10, 8 and 4 so would want to do all Disney, Universal and maybe 1 or 2 water parks. Don't want to do Sea World and can't be bothered to go down to Busch Gardens but would definitely like to head across to Cape Canaveral for 1 day
Staying on site is fantastic with kids, especially if you get a dining plan. We did two weeks on site and two in a villa earlier in the year. Best of both worlds.
I think next time I'll do week and week.