Itachi Uchiha: い,く,しゃ
い What embarrasses them and how do they handle the embarrassment?
Kisame's corny jokes. Being the center of attention. He handles it by ignoring it and wishing it ends as quickly as possible. He doesn’t like to give any reactions or call more attention to himself.
く Stubbing their toe, hitting themselves on furniture, getting a finger caught in the door, etc.
He'd give a pained wince, a really harsh exhale and internalize the rage. I don't see him as someone that punches furniture or something out of anger. He'd be angry and maybe even make a fist, but would try to move on with his day. Fuck coffee tables though.
しゃ What position do they usually sleep in? Do they move around often?
He sleeps on his back mainly. Very rarely on his side. He twitches and shuffles a bit, but doesn't move too much.