Which word best describes someone who has a pleasing personality?

The word "personable" is the best choice to describe someone who has a pleasing personality. It refers specifically to an individual's ability to be charming, attractive, and easy to get along with, emphasizing sociability and likability. When someone is personable, they generally create a positive impression on others and are often enjoyable to be around.

The other options do not convey the same meaning. "Raucous" describes a loud, harsh, or disorderly sound, which does not align with a pleasing personality. "Partisan" refers to someone who strongly supports a particular party, cause, or ideology, lacking the connotation of likability or charm. "Pedagogical," on the other hand, pertains to teaching or education and does not imply anything about being agreeable or pleasant in personality. Therefore, "personable" is the most fitting descriptor for an individual with a pleasing demeanor.