Many of them give me goosebumps, but I was really touched by all of Cass's, particularly:

That night, Cass kicked in the door of his room to celebrate, only to find the man on the bed was an NCR soldier whose barracks had been destroyed. He was cute, though, so after having her way with him, she got the hell out, leaving an empty whiskey bottle as a note. As she walked along the Dam in the night, she felt drunk, content, and happy to be alive. Which to her, was the whole point of it all.

I like Raul's his always feel either heartwarming or badass depending on what you chose to do with him and Rex's always give me a warm feeling. Might be because I love dogs.