My blind spot as an sp-dom is likely my intense need for space. Especially under stress. I won't always tell people I'm falling off the planet. I'll want to just not interact for a week straight. Obviously this can upset friends. Something to work on, I suppose.
I value my boundaries and space so much that I refuse to use Facebook/create an account, & rarely use instant messenger programs. Needless to say, I can be rather hard to track down, if I don't want to be found.