Juan will usually not appear unless a bartender has been hired, or if a bar has been placed on an unowned community lot.[TS2:U] But, like other serviceNPCs, he may occasionally appear at community lots. Juan has the same facial structure as Quinten McAuley. He is mostly interested in sports, weather and work.
In Pleasantview, Juan will always have the personality points, skills, and interests shown below. However, they are always randomized when he is generated in custom neighborhoods. There is no evidence that Juan is related to any one of the three Carla McCulloughs.
Sometimes if he is made playable, Juan's PlumbBob will be inside him, instead of above his head. This happens with several other NPCs in The Sims 2.