prepossession

predilection, prepossession, prejudice, bias mean an attitude of mind that predisposes one to favor something.

predilection implies a strong liking deriving from one's temperament or experience.

prepossession suggests a fixed conception likely to preclude objective judgment of anything counter to it.

prejudice usually implies an unfavorable prepossession and connotes a feeling rooted in suspicion, fear, or intolerance.

bias implies an unreasoned and unfair distortion of judgment in favor of or against a person or thing.