Is Homestar Runner considered obscure these days? That's wild. Seemed like it had such a grip on everybody for the longest time.
It doesn't seem like Motorcity has been mentioned here yet. It was canceled after only one 20-episode season, but featured flashy animation and some of my favorite character designs in a cartoon. While it wasn't perfect, I do think it deserved more than it received.
Stormhawks was one that got tuned into a lot growing up, too. Can't say too much is remembered about it, but it was fun, and not a lot of people seem to recall it when it's brought up.