proclivity
/prō-ˈkli-və-tē/
noun
an inclination or predisposition toward something; especially : a strong inherent inclination toward something objectionable
leaning propensity proclivity penchant mean a strong instinct or liking for something. leaning suggests a liking or attraction not strong enough to be decisive or uncontrollable. propensity implies a deeply ingrained and usually irresistible inclination.