Regular Show - picrelated
Adventure Time - Hugwolf
Steven Universe - Beach Party, returned to see season finale, it was shit
Harvey Beaks - Michelle episode
Korra - just kidding, i actually had the bravery or stupidity to sit through the whole thing. Same goes for Gravity Falls
Gumball - some season 1 episode, I don't remember
Star Wars Rebels - season 2 finale
These are more-or-less recent shows that I actually decided to follow at some point, then quit. Doesn't include shows I never really picked up, but catch a new episode sometimes, like Star Vs.