What I've found with sx-doms I've known in my life (not true of all sx-doms) is they wear their hearts on their sleeves. Even truer for the Se-dom sx-doms I've known. I don't like to hang around people who are in a bad mood and I prefer people who shove it in a bottle when interacting with others. I also don't like talking about deep or personal things because I fear the other person is judging the hell out of me and how knowledgeable I really am or how much I am really 'allowed' to complain.
I don't expect people to change their personality just to interact with me, though, so I try to limit my interaction with them. The exception is one ESFP sx/so who still wants to be friends with me even though I told her about my 'accommodations' (others just ended the friendship). I have to actively tell her to stop talking about certain subjects sometimes, though, and assertiveness is something I have yet to master.
The descriptions of ESTPs and SLEs say that they don't wear their hearts on their sleeves but nothing is further from the truth for one that I knew (also sx-dom). She honestly believed she didn't express her emotions readily because of those descriptions.