Spock breaking up with T’pring for Chapel makes me sad. They could have been so good for each other. And I just now realized: Spock never ends up getting married (that we know of).
Maybe I’m just projecting human emotion, but I feel like that explains some of the more morose/melancholy demeanor seen in his later years. Always put the needs of the many first, even to the very exclusion of his own needs.