If the adjective affable applies to you, it means that you are friendly and pleasant. A snarling junkyard dog is not affable.
The adjective affable entered English by way of the Latin word affābilis, which meant "kind, friendly." Synonyms to affable likewise refer to a pleasant and mild friendliness, such as genial, hospitable, civil, and gracious. So if you find yourself lost and walking in circles, you'd probably be better off getting directions from someone who has these qualities than from someone who doesn't!
