I took a look at the OP's original post again, and I didn't see any mention of tears... There may well have been other elements to the scene that made it, or Trinneer's performance, particularly memorable for him/her.
I enjoy Trinneer's work, and I am one of those who ranks "The Forgotten" among my top five or so
Enterprise episodes. But there are countless reasons for that...the writing, the performances by
all the actors, including Randy Oglesby and Kipleigh Brown, the direction and cinematography, the music.
One of the things that worked particularly well for me about the Trip/T'Pol scene the OP refers to is the controlled performances of Trinneer and Blalock. The scene could have been directed as a gloppy hugfest, but instead, the most powerful emotions remain under the surface, though their presence is almost tangible nevertheless. Far from "blubbering" (which is noisy sobbing), Trip spends most of his time trying
not to cry after he breaks down, and we only see tears in his eyes, not gushing down his cheeks. T'Pol speaks in quiet, measured tones, but there is so much emotion in her eyes and behind her voice.
I also really like that they didn't hug. It was clear that T'Pol grieved for Trip, as a Vulcan would, and wanted to comfort him. Her hand on his shoulder meant far more, IMHO, than a big sweeping embrace between two humans would have meant. And his hand over hers showed his respect for her gesture, as well as a wish to reach out to her as well. There was so much said with an economy of action, hardly any tears, no wailing.
of course it was also discussed real men of certain backgrounds and different regions indeed to cry just like that.
i guess some of us are not as aware of that as some of us..
shrug..
I remember that discussion. I have known folks like Trip, so I found his behavior quite realistic and credible. Viewers not exposed to that background/upbringing/mindset kind of guy--the guy who is strong for everyone else, who holds in his emotions or is in denial, then something unexpected triggers the floodgates to open--they may have been surprised.