Hand 71:

You're right - without a read that BB is very aggressive and will continue most of the time, this is a must-bet river. FPS on my part.

Hand 75:

The only reason I think the 3-bet might be worthwhile is the super-low board. It's hard to put villain on a hand that the 6 actually helped. It just seemed in the moment like a TP or overpair called down and wanted to raise my AK. (It seems like everyone assumes you have AK when you raise PF.)

EDIT: For grammar.