I really really like Death Note! It's my favorite anime & manga series of all time. L is my favorite.

Other animes/mangas that I like:
Tokyo Mew Mew
My Hero Academia
Ouran Highschool Host Club
The Disastrous Life of Saiki K
Puella Magi Madoka Magica
Death Note
Tokyo Ghoul (manga only bc the anime isn't as good)
Your Name
Howl's Moving Castle
Hotarubi No Mori E
I Want to Eat Your Pancreas
Cardcaptor Sakura (I've only just started)

People with similar taste in anime. Particularly Death Note, Tokyo Ghoul, Madoka Magica, and Ouran. I like those a lot.