I have the feeling of most of classic, seminal manga and anime series are underrated by manga/anime fandom nowadays... Alright, not more "Kids these days" grumbling. On topic:
- Panzer World Galient - I hoped an average mecha show, but I was pleasantly surprised. It is pretty good, and I like how it blends medieval fantasy with sci-fi. It is difficult blending both genres sucessfully, but this show manages. And I like also how the big baddie is completely focused on his goal. He knows what he wants and he will not be distracted from his ambitious, far-reaching goals by petty concerns such like scheming generals or revenge against the hero.
- Invincible Superhuman Zambot-3 - Did you think that there was no dark, mind-screwing mecha series prior Evangelion? Watch this deconstruction of a show and you will no longer think that. It is DARK and very dramatic.
- Red Photon Zillion - This show is full with classic sci-fi anime tropes, but it is very entertaining. In the future, a Earth space colony is being raided by an unknown alien race. There is only one thing that can damage them: three weapons powered by a mysteirous substance called Zillion. An organization is created to fight the alien invaders, and the three guns are handed over to the Idiot Hero, the Tsundere and the Cool, Competent Rival.
Do not expect originality when you watch this anime. Expect action and entertainment. Anecdotically, Sega collaborated in the making of this anime, and they created a game based on it.
- Gunbuster - Gainax's best mecha show. I mean it.
"All of this is good and right, but Jenskott, can you suggest some show that is not older than me?"
Give me a minute...
Angel Densetsu - Written by the author of Claymore. I have only read a few chapters but this high school comedy manga is funny and the art is good. And it tells a lot about how we judged people according their looks. the main character is the nicest, kindest person ever, but his whole high school -including students, teachers...- are convinced that he is a dangerous, psychotic bully because his face is very scary. The best part is he has absolutely no idea of what people thinks about him. Hilarity ensues.