proclivity (n.)

• affinity
• animus
• aptitude
• aptness
• bag
• bent
• bias
• cast
• character
• constitution
• delight
• diathesis
• disposition
• druthers
• eagerness
• eccentricity
• fancy
• fascination
• favor
• grain
• idiosyncrasy
• inclination
• inclining
• individualism
• kidney
• leaning
• liability
• liking
• make
• makeup
• mettle
• mind
• mind-set
• mold
• nature
• partiality
• penchant
• predilection
• predisposition
• preference
• prejudice
• prepossession
• probability
• proneness
• propensity
• readiness
• set
• slant
• stamp
• strain
• streak
• stripe
• style
• susceptibility
• sympathy
• taste
• temper
• temperament
• tendency
• thing
• tropism
• turn
• twist
• type
• warp
• weakness
• willingness