I second the JoJo's Bizarre Adventure recommendation. One of the best things about JoJo is when it randomly gets referenced in other Japanese media, even now it always brings a smile to my face.
The general consensus is to watch the second GiTS movie before watching Stand Alone Complex/SAC Second GIG and Solid State Society. Then there's GiTS:ARISE OVA's which add some more to the story but are apparently a feature some inconsistencies. I'm yet to watch the OVA's myself. Akira might be something to consider watching if you haven't seen it yet.
On another note I've been enjoying a couple of the new Shounen Jump series. We Can't Study/Never Learn is rather charming and hasn't gone shit-tier harem like Nisekoi, and as a big fan of Boichi I've found Dr. Stone to be a nice change of pace. Also stumbled upon new Berserk spoilers, so the new chapter wont be far off now.