I think you are revisiting & teasing the idea of "illegible" and dividing it into obscure vs cryptic. Obscure means something the speaker is genuinely unsure about, and cryptic is a sure message meant only for a few. This reading of your mood is of course both.
I think of obscure as simply referentially obscure. Not being sure of what I'm saying is a whole other third variable. That mainly manifests as jokiness.
So both "obscure" and "cryptic" are messages meant only for a few, but cryptic is finely targeted ("you know who you are") while obscure is scattershot ("you know what I mean / you happened to have read the same books").
I tend to be obscure out of laziness, and cryptic out of incompetence. I don't actually like being inaccessible. It's a side effect of other things being more important than accessibility.