Is it only a matter of time before expected feelings of "remorse or shame or guilt" surface during meditation? Approaching yr68, I have committed my share of unwholesome conduct over the years, the typical errors of middle-class youth and adulthood in this USofA. I've been practicing sitting meditation for close to two years, and am most comfortable with Theravada vipassana  concepts and practices, though I have not taken lay Buddhist vows. I generally sit "with the breath" for one hour most every day, some days see two sessions. I have not yet realized "access concentration". I am perplexed that I never have feelings of remorse or shame or guilt over past deeds arise during sitting, and only rarely have I experienced strong feelings of gratitude or happiness. Might I assume that it is only a matter of time before "the stuff hits the fan" and I find myself overwhelmed with "remorse or shame or guilt" during sitting meditation?
I'd suggest that no-one can predict what comes next for someone in meditation. Perhaps there is 'stuff' that has yet to arise into consciousness, but if there is, there's no point trying to 'predict' what it is. That would just be unhelpful speculation.

I'd say, if you stick with sensing what is in your physical experience in a kindly way, if there's something there, it'll make itself known. In the meantime, just enjoy the practice :-)