I like a lot of series but here are some of my favourites:

• Beastars
• Chihayafuru
• D.Gray-Man
• Evangelion
• Fullmetal Alchemist: Brotherhood/Manga
• Golden Kamui
• Jojo's Bizarre Adventure
• Kagerou Daze
• Kaiji
• Katanagatari
• Mairimashita! Iruma-kun
• Mushishi
• Servamp
• Shadows House
• Shimanami Tasogare
• Shingeki no Kyojin
• Shoujo Kakumei Utena
• Shoujo Shuumatsu Ryokou/Girl's Last Tour
• Shouwa Genroku Rakugo Shinjuu
• The Tatami Galaxy
• Yuru Camp

Other things I should mention:

• Ao no Flag
• Annarasumanara
• Aria
• Arte
• Assassination Classroom
• Baccano!
• Bara Ou no Souretsu
• Black Butler
• Blue Period
• Boku Dake ga Inai Machi/Erased
• Children of the Whales
• Chi no Wadachi
• Gankutsuou
• Ginga Eiyuu Denstsu/Legend of the Galactic Heroes
• Hunter x Hunter
• Houseki no Kuni
• Kakukaku Shikajika/Blank Canvas: My So-Called Artist's Journey
• Karada Sagashi
• Kasane
• Kimetsu no Yaiba/Demon Slayer
• Kusuriya no Hitorigoto/The Apothecary Diaries
• Lupin III
• Made in Abyss
• Maou-jou de Oyasumi/Sleepy Princess in the Demon King Castle
• Mob Psycho 100
• Monogatari Series
• Moriarty
• My Home Hero
• Natsuko no Sake
• Nemureru Mori no Karon (for some reason it has a massive RPG Horror Game vibe so... nice!)
• Ousama Ranking/Ranking of Kings
• Pandora Hearts
• Puella Magi Madoka Magica
• Shiki
• Somali to Mori no Kamisama
• The Promised Neverland
• Theseus no Fune
• Tokyo Revengers
• Totsukuni no Shoujo
• Vinland Saga
• Yagate Kimi ni Naru/Bloom into you
• Yokohama Kaidashi Kikou
• Etc.

I also tend to like the works of some mangakas like Junji Ito, Ryo Sumiyoshi (please read Jinba) and Shuzo Oshimi. When it comes to animated movies, I (unoriginally) love the ones from Miyazaki and Satoshi Kon. Oh, and Promare is a lot of fun!