Allow your members to set a status on their BuddyPress Profile with BuddyPress Status add-on for BuddyPress.
This plugin allows your community members to update their status with what they are doing at that moment. It also allows them to set icons such as emojis to appear beside their username at the profile. Thus, your members can also express their moods on their status update.
BuddyPress Status comes with an inbuilt set of icons.