I loved Asa as well (though Dave Watson was my personal favourite as a kid). And, to be fair, Hartford did score some brilliant goals from range, for instance in the home UEFA Cup win against AC Milan in 1978/79. However, I know what you mean. His shooting was, to put it politely, a bit erratic.
I always remember that in my early years, my old man and I sat in the North Stand towards the front of one of the rear blocks to the side of the goal (perhaps Block P, I can't recall). There were a few old blokes in there who always used to joke to me that I was taking my life in my hands sitting up there, as it was where all Asa's wayward shots went.
Still a great player, though. Especially in his first spell.