I'm curious, it can be from any Anime/Manga...
This is a very hard question... Maybe the ending of the last episode of haruhi, chronological order? It was really sweet.. But that's not guarenteed.
"Too many to count, just a few though:Aoshi so freaking beat him too >:0
- When Shinji and Asuka kiss in Neon Genesis Evangelion
- Asuka's first appeareance
- The first time Goku goes Super Saiyan
- When the Lucky Star girls perform the Cheerleading dance in the final episode
- When Kyon kisses Haruhi
- The fight between Yuiki Nagato and the other girl whose name i forgot
- When Kenshin, Saito, Sanosuke and Aoshi fight Shishio
- The last scene of The End of Evangelion, as weird as it was it's one of my favorites.
- Everytime Tomoyo kicks Youhei in Clannad
- The pre-wedding celebration in Clannad
- Goku and Majin Vegeta's fight
Just a few, i still have a lot more"
There is seemingly no 'perfect' way to truly say goodbye. So I gathered a bunch of them!