The present disclosure provides gaming systems, gaming devices, and methods providing an estimated emotional state of a player based on the occurrence of one or more designated events. When a player initiates a gaming session, the gaming system estimates the player's emotional state and generates estimated emotional state data that represents that estimation of the player's emotional state. For each of one or more designated events that occurs, the gaming system updates the player's estimated emotional state using an expected emotional response to that designated event. More specifically, the gaming system updates the player's estimated emotional state data using expected emotional response data representing the expected emotional response to that designated event. If one or more triggering conditions associated with the player's estimated emotional state is satisfied during the gaming session, the gaming system modifies one or more functions, aspects, or features of the gaming system.