Anime original? The good ones I'd recommend are all fairly popular and talked about. I guess maybe Space Patrol Luluco? Was talked about a lot on /a/ when it aired a couple years ago, but nobody mentions it anymore. It's a comedy short series by Hiroyuki Imaishi (director of Gurren Lagann and Kill la Kill).
Dennou Coil was anime original I think, and it gets basically zero discussion anywhere. Kinda sci-fi mystery show, hard to describe it, but very good.
Some older series that were when I first started getting into anime, super popular but I never see talked about anymore, are Princess Tutu and Paranoia Agent. You might've heard of them already depending on when you got into anime, I know Paranoia Agent aired on American TV back in the mid 00s. Princess Tutu is a deceptive looking show, is a pretty gripping fairy-tale inspired story.
>>717071Seconding this, it's a blast to watch. The clunky CGI for the characters turned off a lot of people when it aired, but it looks fine for the dogfights and the sound direction and voice work are both superb.
>>717070Not an anime original series.