If you liked the Ergo Proxy anime, the Anime-Planet community thinks you'd like:
Constable Fuse is part of an elite Special Forces unit known as the Capital Police whose mission is to maintain peace during a time of civil unrest. Fuse becomes entangled within a web of intrigue and politics between the Capital Police, the government intelligence bureau, and a secret society known as Jin-Roh – the Wolf Brigade.
Do you enjoy talking?
Did you enjoy long winded, overtly complex lectures at you the audience?
If you found yourself really enjoying one of these "talky" titles, you might enjoy the other.
I found Jin-Roh to have more of a reason for the 20 page dialog per scene, but they are of a similar feel.
Unbeknownst to humans, demons from an overlapping dimension walk amongst them in the streets of Tokyo. The balance between the worlds is kept by the crow guardian Karas and Yurine, its master and voice of the living city. However, the time of harmony nears the end as the once-Karas Lord Eko returns. Seeking to purge humanity for its evils, he terrorizes the city with his minions that feast on human blood. The ultimate battle between good and evil awaits; can Yurine and her newly initiated Karas prevail against Lord Eko and protect their city against his monstrous horde?
If you found yourself drawn into either Karas or Ergo Proxy, I expect you'd do the same for the other. Both animes feed you pieces of information rather than giving the plot to you straight, and although this can make them confusing at times, a re-watch made them both way more enjoyable. Both Karas and Ergo Proxy have beautiful animation, too. The main difference, and it's an important one, is that while Karas is whirl-wind fast paced, Ergo Proxy is very slow paced, but these styles are both very successful. However, I think they both have the same dark, addictive feel to them.
In another world, there exist many countries, each with different cultures, customs, and traditions. From technological marvels to folk legends, each location yields a vast wealth of insight of its people: their hopes and their dreams, their failures and fears. Kino is a traveler whose goal is to visit as many new places as possible, learning about others' ways of life, but also making sure to stay clear of their affairs. Together with the talking motorrad Hermes, Kino sets out to explore the beautiful world and meet its inhabitants, wherever they may be.
Kino's journey tends to be slightly more light-hearted than Ergo Proxy, however both are in worlds where people are separated by their own insanity bubbles. Kino’s journey quickly delves into deep content and provides material for questioning life. Ergo Proxy is more mysterious in building a plot and involves more action genre. The general motif of the two shows is the clear separation of ideologies inciting deep thought.
Kino’s journey is best for those who want a short and sweet experience in a changing environment. Kino’s journey does not end. It is more like a standard Pokemon show where every episode the gang gets themselves into something new somewhere new.
Ergo Proxy caters its changing environment to those who love action and involves more darkness. It has twice as many episodes and one progressing storyline.
Kamba and Shouma Takakura have taken care of their sickly younger sister Himari since their parents disappeared years ago - that is, until the day she died. But as the boys grieve by her hospital bed, Himari sits up, adorned with a strange penguin hat. Suddenly, the three of them are transported to a vibrant world where the hat, using Himari's body as a puppet, charges these brothers with a task: find the Penguin Drum and their sister's life will be saved! Now aided by some odd penguins they received in the mail, the duo must find this mysterious item or risk losing the sister they care for so much. However, they aren't the only ones with their sights on the Penguin Drum, for new enemies await them around every turn, all connected in ways they would have never imagined...
If you liked the thought exercise you experienced in either Mawaru Penguindrum or in Ergo Proxy, you'd like the other. The amounts of thinking, picking over details in order to get what exactly is happening. The philosophical themes of both animes are also prominent aspects in each series, with Mawaru Penguindrum predominantly about Fate and Ergo Proxy predominantly about Existence.
Metropolis is a grand high-tech city-state populated by humans and robots alike. It is in these streets that Detective Shunsaku Ban and his sidekick Kenichi search for the rebel scientist Dr. Laughton who unbenounced to them, is developing a super android named Tima as a tool for the Duke of Metropolis. What starts out as a normal case turns into mayhem as the scientist is murdered, and the true plans of the Duke are finally revealed...
While plots in those two shows aren't very similar, cities that appear in both of them give a similar feeling (Romdeau in Ergo Proxy and Metropolis in the movie by the same name). It is worth noticing that, robots in both anime, seam to have similar social role as well as their role in the story (there is no Cogito virus in Metropolis, but still). Also there is a small similarity between Pino from EP an Tima from Metropolis. If you like dystopia shows with good animation, you should give those a try.