I'm just here to suggest you my favorite anime of all time, if that's you haven't Watched it yet.
This was one of my first animes and the anime which genuinely made me a coffee addict..
Not bragging tho but ever since I've watched the first season I've never skipped a day without drinking coffee (other than the days I was sick maybe)..

Let's talk about the themes and Genres now

The Primary Genres of Tokyo Ghoul are:
• Dark Fantasy / Supernatural
• Psychological Thriller
• Action
• Seinen

An anime with these genres shouldn't be someone's first ever animes, but it was for me and that made me a fan Psychological Thriller animes (ex: Parasite)

Now the core themes of the anime
• Identity and Duel Life (The struggle to balance two conflicting halves of someone [ Human & Ghoul] )

• Moral Ambiguity (There's no heroes or villains, Both humans and Ghouls commit atrocities driven by their survival, love and grief)

• The Cycle of Violence (How hatred and revenge shapes two opposing groups)

• Belonging and Isolation (The deep need to find acceptance and community in a cold, unforgiving world)

Hm: Identity Crisis

This is the typa anime which will make your perspective on things different.. at least that's what it did to me

Also the Character Development and Sound tracks are one of the best in all of anime..

Some people may say it's better to read the manga..
The manga is indeed way better than the anime, but the anime adaptation is good in its own way..
I've read the manga 4-5 times and have rewatched the anime like 20 times..

Ngl Every time I rewatch the anime, I notice something I've never did before..