Great opening episode. My girl Fluttershy still shows she's resistant as can be to everything; Discord had to flat out get frustrated and cheat on her (kinda sorta Rainbow Dash as well, but he didn't seem to be trying as hard with that one). And Discord made for an excellent villain, probably my favorite of the show so far. He's got the perfect voice and style for it, even if I don't much care for his physical appearance (and full disclosure, I'm not a Star Trek watcher and had no idea who the actor was before I watched the episode). Also, CMC's ruin everything. As usual.
Like everypony else, I can't wait for next week now.