There were so many! I'll list a few: Transformers The opening theme for season one/first generation was so badass! Teenage Mutant Ninja Turtles Radiation affected turtles with their radiation affected Japanese rat sensei, a talking brain from Dimension X and a love of pizza. Defenders of the Earth Ultimate American space opera with major cartoon strip characters Flash Gordon, Mandrake the Magician, Lothar, The Phantom, and all their children. All standing guard against Ming the Merciless' various, dastardly plans, usually involving either the conquest or destruction of Earth. Danger Mouse Anthropomorphic super spy. Count Duckula Looking back, some brilliant, quirky satire. I saw some episodes recently and quite a few jokes would have gone over my 7/8 year old head. The humour just couldn't be drier or more droll. Jayce & the Wheeled Warriors A science-fantasy, space opera quest-adventure. Unfortunately unfinished. Thundercats Mostly a planetary romance, but with some heavy elements of space opera. The villain Mumm-ra, one of the baddest dudes that ever unlived! The Real Ghostbusters This was such a great continuation from the film. I'd say it captured the zaniness and humour of the original perfectly and still managed to be quite dark at times. Bravestarr A great science-fantasy, planetary romance with strong Native American aesthetics and a pure, frontier-style sensibility. Some of the individual episodes could be a little cheesy but, nonetheless, I used to love this cartoon. Spoiler The animated movie, The Legend, that introduced the show: Dungeons and Dragons Seriously great. I absolutely loved the adventures of this group of kids that find themselves in an inhospitable land of magic where they're used by the Dungeon-master to oppose Venger. Definitely a fave. SDF-1 Macross Military space opera at it's best, like only the Japanese can do! Definitely way ahead in terms of animation compared to the rest of the world at the time. A continuous cartoon series. Spoiler The English opening - same visuals, but without the Japanese song and a more 'American' sound: Les Mystérieuses Cités d'or (The Mysterious Cities of Gold) Another fantastic, continuous cartoon series, with a recap of the previous episode in every subsequent one, and a historical informative section at the end of each episode. A French/Japanese co-production. A historical cartoon during the Spanish expansion into South America with a very strong science fictional underpinning. There's a youtube comment "I lost my shit as a kid when they found the golden condor." That is exactly how I felt! Brilliant mix of history, adventure, anthropology, ethical dilemmas and science fiction. One of the absolute best cartoons. Les Mondes Engloutis (Spartakus and the Sea Beneath the Sea) A French production. Another continuous cartoon series, but this time a really surreal, far future, post-apocalyptic quest adventure. It was quite concept heavy - in hindsight, there was genetic engineering, nanotechnology, artificial intelligence, anti-gravity technology, evolutionary divergence, a "Mad Max" type environment, etc. I remember some episodes being very, very strange, but it was always so damn compelling! These are available for sale as DVDs in French, but no subtitles or dubbing. I've checked about two or three times over the last 7+ years and I'm still keeping my fingers crossed for an English-friendly release. Love the intro music (both French and English versions). Spoiler It seems some kind fan-translation group has uploaded the first episode in the original French, but with English subtitles: The Legend of Prince Valiant Possibly the best cartoon series I have ever seen during my childhood. Based on Hal Foster's Sunday comic strip, this was a fantastic (albeit liberal) adaptation and featured spectacular voice actors (minus the three principal American voices). As the series continued, it introduced very nuanced, overarching story arcs dealing with a whole host of themes: right action, the meaning of justice and truth, ideological conflicts, new orders supplanting the old with all the attendant strife and discord, culture clashes. It didn't shy away from depicting violence, bigotry, and the dangers of uncontrolled ambition and vengeance. I have so much to say about this cartoon that I could probably dedicate a whole new thread for it. And my favourite and most enduring theme song out of them all bar none. Spoiler The Legend of Prince Valiant Episode 1: There are tons more, but the ones I've listed were definitely some of the more vivid cartoon series I remember. Which ones were your favourites?