It seems to me that ALL users here have an Avatar. At least I do not see anyone without one. 

Is wpForo using some type of default avatar plugin? Looks like letter based and multiple colors? Just curious since I just moved over and so many users do not have an avatar yet. But I like the idea of auto ones, but the default selections in WP is not great. But I really like the letter one here. Saw one plugin similar, but it was out of date and would display double in size.