Is there any Good Deep-Thinking Anime that You'd Recommend?

Hey Guys,
I was just wondering if you’ve seen any good Deep-Thinking anime that you could recommend to me, I’m on an Anime Spree and I don’t want it stop right now. When I say Deep-Thinking, I mean like Psychological ones like Death Note or Higurashi no Naku Koro ni Kai.

I’ve already seen the likes of Death Note, Chaos;Head, Higurashi and Code Geass, I was wondering if they’re anymore good ones like them?

I don’t care between Subbed/Dubbed.

Thanks in Advance!

[FONT=“Arial”][SIZE=“1”][COLOR=“Silver”]P.S If you don’t like Anime don’t bother Posting about your hatred for it, Ok? There’s a Place for that… somewhere.[/COLOR][/SIZE][/FONT]