I'll miss /a/. I'll miss the autistic schizoposting on /dbs/. I'll miss shitposting about the WG jews on One Piece's pseudo-generals. I'll miss being a lazy faggot and being spoonfed all the new chapters from all the manga I follow weekly. I'll even miss the storytimes, even though they were a sign of late stage decline of the board since they only appealed to nostalgiafags like me. I'll miss discovering masterpieces like Baki and enjoying them together with my fellow /a/utists.
I'm not even a hardcore animefag, but I liked how light-hearted the board felt while at the same time being (relatively) high speed. It was entertaining, at the very least. Very good when going to the shitter.