Let’s talk Superman the Animated Series. Who was your favorite villain? What episode did you enjoy most?
My favorite villain was Metallo. My favorite episode was “Stolen Memories.” Although “Double Dose”, “A Little Piece of Home,” & “Little Big Head Man” are my other favorites, “Stolen Memories,” just wins out by an inch to be my most liked.
The one with Dr Fate
Darkseid
Mxyzptlk episode, Darkseid for villain tho
Apokolips Now & Ghost in the Machine. Both episodes were amazing and laid groundwork for significant stories later in Justice League. Favorite character is Superman. I think we see a classic and new take on his character at the same time, a lot of what happens in this series really affects him later in the Justice League series and I thought that was brilliant. Lex and Lois for honorable mention.
Parasite is really cool in the show. But I feel brainiac is not that great in this how
Personally, I am all about Darkseid. 
Yeah, gotta agree with Harleys Puddin and say Darkseid is definitely my fav.