I feel fortunate to have the custody agreement we settled on.
Two out of every three weeks:
My XW will pick up the girls after school on Monday, have them all week, and then drop off the girls at school on Friday morning.
I will pick up the girls after school on Friday, have them all weekend, and then drop off the girls at school on Monday morning.
The other week we reverse this schedule. This gives my XW more overnights (and a little child support that comes with it), but it gives me more weekends (no school).