I didn't see a thread for this, but if there's one already like it then feel free to merge this.
Anyway, mine would probaly be:
Arabasta, Jaya, Water 7 (One Piece)
Chapter Black (Yu Yu Hakusho) - I think I'm one of the few people that liked Chapter Black better than Dark Tournament.
Kyoto (Rurouni Kenshin)
Battle Tendency and Stardust Crusaders (JoJo's Bizarre Adventure) - Battle Tendency was just awesome all the way through. I didn't like Stardust Crusaders as much as Part 2, but Jotaro vs Dio more than made up for it.
I'll post more later if I think of any.
EDIT: Forgot about HxH. For some reason I really liked the Hunter Exam Arc. Greed Island was awesome too. I actually didn't think the Yorkshin Arc was as good as some people make it out to be. Does that make me strange?:sad: