Both Uses

bias
in
The Perks of Being a Wallflower
(Auto-generated)

Maybe I was biased, but I don't care.†
p. 170.9

biased = created a personal preference; or creates a tendency to move in a particular direction
And maybe I'm biased, but when my sister quoted a pop song and talked about the future, it seemed great.
p. 189.1 *

biased = showing favoritism (under the influence of a personal preference that prevents being objective)

Definitions:

(1) (bias)
a tendency to favor one side -- in people, a prejudice that affects fair judgment; more generally, any built-in lean to move or behave in a particular way (like a car that pulls right)
(2) (meaning too rare to warrant focus)
Specialized meanings of bias include:
- statistics: any of several errors that distort results
- textiles: a line or fold that is diagonal relative to the sides or grain of the fabric
- electronics: a steady-state current that is forced through an electronic device