Maybe not as powerful these days, but when Rogue grabbed Remy and kissed him right before the Age of Apocalypse stormed into existence was such a huge moment for young me, it was the culmination of a buildup that I had been rooting for since the beginning and seeing it on the page was pretty fantastic. I was very moved because when faced with the end of things, she thought of him overwhelmingly.
Not emotional or powerful but frightening and creepy was Bastion asking Matthew Risman (in the X-force Angels and Demons by Craig Kyle) if he is defective while pointing a glowing palm at his face. Bastion was just a creepy mofo
When we learned that at one point, Scalphunter used to be a decent guy.
And worked at a restaurant as a cook along with Gambit.
A nice emotional moment between Iceman and Storm. A rarety.
Backstory is that Dani goes on a date with a white man that she was interested in and it was going well until some robbers hit up the lodge they were at. She makes sure to get him to safety in order to protect him. She used her powers to stop the robbers and when her date realize she's a mutant, he dumps her