Something a bit more on the Sci-Fi end that is also very psycological is ID: Invaded.
It's only twelve episodes, so it's not a huge time investment either.
And I'm glad to see you watching Monster, I ended up rating it as my favorite Anime of all time, just barely beating out Cowboy Bebop.
I really enjoyed watching Space Dandy years back. That was a long, long time ago.
I think in a bit I'll reset my account info on MAL and have a look at what I did see and wanted to see. There must be a lot in the lists I never started. I think I've just about seen the "classics" that gained more popularity as of late with anime getting more popular or the shows ending up on Netflix.
A big favourite of mine was Welcome to the NHK. Also, would you believe that I actually rather dislike JoJo?
Now browsing a few lists and a lot of shows are coming back to me. There's definitely a few I didn't finish too. Thanks for the recommendation still, I'll definitely check it out. I have a pretty relaxed schedule at the moment so tons of free time.