Justice heroes or kind-hearted good guys are common and likable.
I don't like overly perfect types. I can accept some flaws or quirks; yandere or tsundere types are also acceptable.
(For example, introverted, not good at socializing, needs things neatly arranged, or loves sweets, has a sharp tongue and likes to satirize others, is an anime otaku, a tech otaku, etc.)
Villain types are unconventional and also good. Anti-hero concept? Having their own unique aesthetics or beliefs, adhering to principles, and being different from others.
Except for torture, dismemberment, murder, corpse disposal, and using sharp weapons to hurt people—that's too perverse and disgusting.