if you liked so much why you wanna delete?

If I was going this route, I would definitely re-read both Oyasumi Punpun, and Ichi the Killer because both of those series had me seriously losing my shit when I was reading them, I guess you could say Gantz was sort of the same way but I also remember that series being a painful and lengthy drag. I would really like to re-read Air Gear again since its still one of my favorite series which I re-read anyways from time to time since I'm constantly buying the manga.

For anime I would probably want to re-watch, Clannad, Elfen Lied, Toradora, Your Lie in April and just have a major feels fest. Another good few would be Tenga Toppa Gurren Lagann, Kyouran Kazuki Nikki, K-ON! and Love Chunibyo & Other Delusions since I remember watching those the first time and just loving every second of it. It's the sort of feeling I get since I started watching Cowboy Bebop, you're just like, this is anime the way it was supposed to be done. Another good couple ones would be Working, The World Only God Knows, the Monogatari series. They might be recent series but I enjoyed the living crap out of them while watching them in simulcast, I could only imagine if I could have binge watched them.