New to the game. What is the consequence of the flash point dialogue choice (heart, brain, fist)? Does it really matter? What did you guys pick?

[libro]

Just what a title said.

[it's_over_9000]

There are no consequences when choosing the dialogue choice. Heart will mostly mean sincere, brain usually is rational, and fist is mostly anger or annoyed. I mostly went with the brain, some heart and fist. Just depends on how you feel I guess. It really doesn't matter and wont change the outcome of the game. Game play and ending will always be the same whatever you choose. Hope that helps.

[Roccondil]

There are a couple moments that do change some elements of succeeding cutscenes, but the payoff is usually extremely limited and only a short time after the decision is made. Other flashpoint moments don't do anything other than allow you to have Aloy express what you feel or what you think Aloy is feeling in the moment.
Either way, as mentioned above, the long-term overall story does not get affected by any Flashpoints.

[Sharkeisha]

Rule of thumb - It doesn't really effect anything but dialogue EXCEPT when it might involve someone living or dying. I think once or twice dialogue options may effect if you have a teammate for a quest.

If you want the achievement for acquiring all the allies in the game, the life/death choices matter.