They like about half a day of sun, Evan. More than that and the leaves droop. They're in pots and just can't drink fast enough if they're in hot sun all day.
I had a pot of them sitting in a tub of water and afternoon sun last spring, and it didn't make a whole lot of big leaves, but it made dozens of pups.
Blue Hawaii is the one I have, btw. I've divided this one to grow starts for our plant sale in October. I'm just blown away how they've grown in less than a month!