I loved all of them! <3 Since villains are always my favorite characters in media these characters are no exception. Equestria has its dark moments. My favorite villain? Discord of coarse. xD He is the most fun and despite being reformed now, as a villain he was absolutely fun! :3 King Sombra is on my second because he is the most darkest and twisted villain. <3 Third is Queen Chrysalis. She can feed on my love any day. ;D xDD And last on my list is Nightmare Moon. ^^
lets see: NMM for being terrifying, dangerous and Luna. Discord for his insanity, corrupting the mane six and being so darn funny. Chrysalis for being intimidating, having a great, well executed plan and darn hot. Sombra, for being that kind of entity you barely know is present, but present enough to scare you shitless of terror. but my choice is Chrysssssalisssss.
Allow me to be different from the majority and go with...
1. King Sombra. All the haters who go all "OMFG BUT HE SUCKED HE DIDN'T DO ANYTHING" didn't get the eerie looming role he was supposed to play. He's a menace that does not need to be onscreen to be felt. Those who did get it but just don't like villains of that sort, alright, but I personally loved this nightmarish dark cloud of pure evil, who just did his thing without stopping to gloat like all the others. He made no mistakes, instead getting honestly outmatched by the heroes. Easily the darkest villain on the show and for that he gets a lot of respect points.
2. Discord. I like him equally to King Sombra, really, but the King ends up higher because Discord is less of a "villain" (he is even redeemed in Season 3!) Love how he combined hilarious randomness with just the occasional moment where he shows just how devoid of morality he really is (calling him "evil" is a misnomer, he is really more alien than evil).
3. Chrysalis. Great design, great idea, but I don't like how her evil plan had more holes in it than her body, from the terribly flawed impersonation to imprisoning the two greatest threats to her plan in the exact same, poorly guarded place.
4. Nightmare Moon. Kicked off the show, good design, don't really like how she kept fleeing from battle and leaving behind challenges that in the end serve only to teach the ponies the value of friendship.
i agree with nr 3. Chrysalis should have studied Princess Cadance's memories and behavior better and maybe have used some changeling brutes to keep Twi and Cadance from escaping instead of three mindcontrolled bridesmares.
True, but personally I wouldn't fear him, I liked Sauron xD then again I'm a BIG LOTR fan/nerd and a lot of my inspirations come from that movie set. I just kind of wished he managed to at least go through with his plan like Q.C did, I felt as if Sombra didn't get a chance to actually be evil xD then again theres nothing bad with doing something different.
Yeah, I was disappointed too, that he had not too much screen time But I love the hidden idea for him: Lord of Shadows, Dark King... and honestly, the fact that we don't know anything about him makes me happy, because now I could draw a lot of fanarts with him and write a lot of fanfics xD