The last hour-and-a-half of K2's daytime naps.
Seriously, since the little kid came home, she has not been sleeping more than 30-40 minutes at a time. Before LA, she'd do an easy 1.5-2hr morning nap, then a 2+ hour afternoon nap, plus other scattered naps throughout the day. Plus a solid 8 hours-plus at night.
And where you could put her anywhere--on the floor, in the crib, in the bouncy chair--and she'd fall asleep, now she won't sleep unless she's got us in a cramp-inducing position: either held upright, invisible Bjorn-style, on my chest, or in the crook of my knee, with a bottle. In either case, then, the length of her nap is determined entirely by my own need to go the bathroom or regain circulation in my limbs.
I know kids go through phases, but I seriously hope we haven't left the Sleeps Like A Champ Phase completely behind...