(n.) A previous liking; a prepossession of mind in favor of something; predisposition to choose or like; partiality.

a thing for affinity animus aptitude aptness bag bent bias cast character chosen kind conatus conduciveness constitution cup of tea delight diathesis disposition druthers eagerness eccentricity fancy fascination favor favoritism feeling for forejudgment grain idiosyncrasy inclination inclining individualism jaundice jaundiced eye kidney leaning liability liking make makeup mental set mettle mind mind-set mold mutual affinity mutual attraction nature one-sidedness parti pris partialism partiality particular choice partisanship penchant personal choice preapprehension preconception preconclusion preconsideration predecision predetermination predisposition preference prejudgment prejudication prejudice premature judgment prenotion prepossession presumption presupposal presupposition presurmise probability proclivity proneness propensity readiness sensitivity to set slant soft spot stamp strain streak stripe style susceptibility sympathy taste temper temperament tendency thing tropism turn turn of mind twist type undetachment undispassionateness warp weakness willingness