I know people are gonna argue about how often they cry and hug, but my argument is that it's not so much about the frequency of it but the significance of it. Whether it's 5 times over the course of the series or 30 times, I just think they go to the well of those emotional scenes so much, and sometimes when it's awkward for the situation, that they lose their significance.
That after a while it loses its dramatic effectiveness to show a character breaking down from a situation as a way to show how bad the problem they're going through is, if you've already shown them being emotional over and over again. Because, at that point, it's no longer a commentary on the situation, but something you expect from those characters as part of their personality.