Pretty much what it says on the tin, just state what your favourite arc in anime/manga. It doesn't have to be from long running shows, it can be certain stories or the whole stories itself from short anime as well and just give an explanation why you like the arc in the first place. Also you can have more than two if you want.
My favourite arc would be the Chimera Ant arc from Hunter x Hunter. I had a bit of trouble deciding what my favourite anime arc was before, but once the CA arc came about, my decision became a lot easier. What I like about it is that it's very dark, you will see people getting killed in very brutal ways, massive amounts of character development for all characters, especially for Gon, Killua and the Ant King, who by the way is one of the best villains I've seen in anime. The arc also tackles mature themes like identity and human nature very well, especially in regards to human nature as it starts off showing how cruel and vicious the Ants can be, but near the end, it shows that humans can be just as violent, if not more so than the Ants and it handles it so well. Great OST, one of my favourites to date, especially the track, Kingdom of Predators which really sets the mood for the arc
Finally it's ending is a masterpiece, just beautiful and sad
So I talked long enough, what's your favourite arc?
My favourite arc would be the Chimera Ant arc from Hunter x Hunter. I had a bit of trouble deciding what my favourite anime arc was before, but once the CA arc came about, my decision became a lot easier. What I like about it is that it's very dark, you will see people getting killed in very brutal ways, massive amounts of character development for all characters, especially for Gon, Killua and the Ant King, who by the way is one of the best villains I've seen in anime. The arc also tackles mature themes like identity and human nature very well, especially in regards to human nature as it starts off showing how cruel and vicious the Ants can be, but near the end, it shows that humans can be just as violent, if not more so than the Ants and it handles it so well. Great OST, one of my favourites to date, especially the track, Kingdom of Predators which really sets the mood for the arc
So I talked long enough, what's your favourite arc?