Generally I'd say the Marvel shows are good, though primarily just Daredevil Season 1 & 2, Punisher, and Jessica Jones Season 1. Everything else is a mixed bag to me.
There's good anime, like they just released A.I.C.O. last week which is a good one shot season. That Castlevania anime that was brought up. Little Witch Academia is abit weak, but still a cute anime. Blame was an interesting scifi anime movie they put out. And not anime, but sorta is, the new Voltron series they have is actually pretty alright. Same kinda style as the Avatar: The Last Airbender/Korra series.
All I can really think of that is original to Netflix that I've gone through...Otherwise I just sorta use it casually watch some other shows that get put up from other networks like Z Nation, Gotham, and Agents of Shield.