What do I know this actor/actress from? (filter actor/actresses shows/movies by watched)
Often I recognize an actor/actress, and I find their name, but I'm still not sure what show/movie I know them from. You have all the info needed to fix that!
I suggest there be a way to filter the shows/movies on a "people" page (trakt.tv/people/...) to only show the shows/movies that you've watched. This functionality will only improve in helpfulness as people update their trakt profiles to be more complete, and as trakt's actor database becomes more exhaustive.
Good idea, could do a fade type of filter like we have in other sections.