Bias: (noun) A line going diagonally across the grain of fabric: Cut the cloth on the bias. A preference or an inclination, especially one that inhibits impartial judgment. An unfair act or policy stemming from prejudice.A statistical sampling or testing error caused by systematically favoring some outcomes over others. Sports. A weight or irregularity in a ball that causes it to swerve, as in lawn bowling. The tendency of such a ball to swerve. The fixed voltage applied to an electrode. (adj. ) Slanting or diagonal; oblique: a bias fold.

Proclivity (noun) : A natural propensity or inclination; predisposition; a strong, inborn preference or fondness for something: "Inclination" implies a mild interest in something. "Proclivity" indicates a strong interest or fondness. "Fetish" implies an unusually strong, even unnatural proclivity toward an object.Suggested Usage: The word "fetish" is both mis- and overused, so bring "proclivity" into play when speaking of strong but comprehensible preferences. "He has a proclivity for peanut butter and guacamole sandwiches" or "She has a proclivity to overstate the historical importance of her ancestors."

Predilection: A partiality or disposition in favor of something; a preference.
Converse of object
have: Foreign banks do not have a proclivity nor do they really feel an interest or need to go down market.
demonstrate: Furthermore, Jeremiah does not elsewhere demonstrate a proclivity for making such specific predictions.
Adjective modifier
ideological: And that primitivism, shorn of all its ideological proclivities, is better off with another name.
political: As to contemporary issues, the book concludes in a way that hardly matches my own political proclivities.
personal: There's nothing overtly broken with the game, but you may love or hate certain aspects of it depending on your personal proclivities. natural: Janardhana was, by instinct and natural proclivity, a person who wanted to talk to families on a personal basis.
Source: YourDictionary/Answers.com