This song, just this song. It's telling that three years later and it's still be commenting on and has very few bad comments(which are all drowned out by the optimistic cheering of everyone else)

Something about it makes me think back to when I first become a brony I feel that warm and fuzzy feeling I did when I discovered the community and show for the first time and became a part of it.

http://www.youtube.com/watch?v=LH8Ri2VULHo