The favourite games and favourite users pages should list the favourited items. I would recommend a two column setup* with the activity items most prominent. Additionally, the user listing should allow removal without navigating to the user's page (a small "[-]" or a small version of the star from the profile pages)

• At least for the favourite users page. I don't have any favourite games yet, so I'm not sure what the activity entries are like there. The favourite user entries are narrow enough to allow for two columns comfortable, even after a font size increase.