We enjoy a few of the same anime! I've been in the same boat as you, it's sometimes hard to find an anime that can top previous ones that we've enjoyed. Here's a small list of anime that you might like: Steins;Gate - It's about time travel and has many intellectual aspects and plenty of twists.. This has become my favorite anime so far, so you will most likely take a liking to it as well.
I was kinda bummed that it was only 24 episodes, although that isn't a problem because of the amount of awesomeness in this anime. Darker Than Black - You may or may not like this anime, it has a dark and interesting plot. It's about people that have supernatural powers which are held together by contracts.
In return of using their powers, they must follow what the contract tells them to do. For me, it gives off a Death Note type of feeling.. I don't know why, but I loved this anime. The first season consists of 25 episodes and 4 OVA's (which you need to watch).
Then there is the second season which only has 12 episodes. Deadman Wonderland - Gruesome anime, has a nice dark feeling to it. It's about a young boy named Ganta that is falsely accused of murdering his classmates.
He is then sent to a prison named "Deadman wonderland". It's only 12 episodes, but it's really a fantastic experience. This anime is among my top 5 for sure.
So those are a few anime that I've really liked, I say you should at least give them all a shot and see if you like them.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.