most peoples favorites are smth like: attack on titan, parasyte, sword art online, full metal alchemist.
all of them except sword art online are very good in my opinion and 100% worth watching and good for beginners so i would recommend one of them
Hunter x Hunter 2011, Parasyte, Hellsing Ultimate, Fullmetal Alchemist Brotherhood, One Punch Man
My Hero Academia
Bleach, those are some good starter ones If you watch bleach look up a "filler guide and skip almost all fillers"