If the count is zero or above, stand on the 16. Unless the count was quite negative going into a hand, odds are you would wind up standing on a four-card 16 versus a 10, but not always. Either way you won't hurt yourself much by standing on that hand.
But Bootlegger beat me to it. I would have stood on the 16, considering the count and the conditions you described.
It sounds to me like you are just beginning to learn card counting. How many books do you have in your library? I would highly recommend Bootlegger's 200 Proof Blackjack, Stanford's Professional Blackjack, and Don Schesinger's Blackjack Attack, Third Edition for starters. These books are invaluable for APs, and should be required reading, imo.
All of these books can be ordered from Pi Yee Press, here's a link:
I think you're talking about 6/5 games...and that isn't really blackjack.
Single deck games are particularly vulnerable to card counting...that is why they are almost extinct...they are very easily beaten with relatively tiny bet spreads that are hard to detect. (spreads like 1-3 and with great rules or cuts 1-3 with 2 units at the shuffle).
The truth is exactly the opposite of what "your experience" is.