It really depends there's a lot of bad animes and there's definitely some good ones so far the only ones I can recommend are:
Cowboy bebop
Fullmetal Alchemist
Fullmetal Alchemist Brotherhood
Attack on Titan
One Punch Man
English
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Also, [i]Serial Experiments Lain[/i] and [i]Texhnolyze[/i].
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You need to add [i]Neon Genesis Evangelion[/i] to that list. If you haven't seen it, watch it then add it.