* ''[[http://www.fimfiction.net/story/42920/longing Longing]]'' is chock-full of this. From Spike telling Twilight that he wants her to be his mother, to [[spoiler: Twilight adopting Spike]], and everything in-between.
* Anytime [[spoiler: Blaze]] puts his brother/[[spoiler: Adopted son]] ahead of himself is sweet.
** [[spoiler: Also heartwarming is when Twilight becomes his girlfriend. Specifically, on their first proper date.]]