Definitely bet more PF. With the image you have, it makes it look like you are 3-betting lightish and are looking for folds, rather than a big pair looking for value. That should deceive players a bit, as well as get that pot building.
If you assume the worst, you got called by the following hands on the flop...
AA, K
K
, QQ, JJ, TT, A
K
You equity on the flop against this range was 55%. It will be more on the turn as the 8
won't have helped it. So bet there is fine.
What calls you on the turn if you fire again? If the answer is only AA, KK, and TT, then betting makes not sense. If QQ will call, then you're still behind. If JJ will call as well, then I think betting does make sense since you are still getting value from that range. I think cause you're both still so deep that a 1/2 - 2/3 pot will keep a heart draw in the hand. So add AKh and maybe even AQh-Th into the mix as well. The more that the calling on the turn range of hands increases the more you should lean towards betting.
What would you have done if you had bet turn, and then been check-raised? You're deep enough to make it easy to get away from the hand.
I think that fact that you have the image as a bluffer, makes me say bet turn. You're more likely to get called by worse hands, then if you had a very tight/nitty image.
Do you think Villain would be the type to always 4bet AA pre-flop, and only that hand (or KK as well)?