that seems like much more of an Alpha SF thing. My mother's an ESE and laughs at every joke other people make in conversation, and last year I had an ESE girl in one of my classes who would laugh at almost everything. It's rather annoying to me.
As an EIE, most of the time I'll give a small "polite laugh" or smile and exhale out of my nose a bit. Actual laughing is relatively infrequent for me.