1. A computer-implemented method for gathering consumer shopping preferences for merchandise items, the method comprising: gathering one or more sequential images of a consumer trying on a first wearable merchandise item in front of an image sensor at a point-of-decision location, wherein the merchandise item is not purchased later by the consumer; identifying, by the computer, the first merchandise item being worn by the consumer based on the images; determining, by the computer, a demographic group associated with the consumer based on the images; detecting, by the computer, behavior patterns indicating an interest level of the consumer based at least on information about the consumer's decision-making process from the images associated with the merchandise item that is not later purchased; determining, by the computer, a mapping between the identified consumer demographic group and the interest level for the identified merchandise item; producing, by the computer, a model which encodes the mapping; displaying to the consumer a first set of images of a variety of wearable merchandise items overlaid on an image of the consumer; and analyzing, by the computer, a second set of images of the consumer to detect additional behavior patterns of the consumer, wherein the second set of images of the consumer viewing the first set of images are captured by a second image sensor.