I think the visited Sylvan Glade trait it means your sim gets the option of clicking on the tree and traveling directly to Sylvan Glade without having to do the follow the prompt puzzle. The fifty mile high trait may trigger the player achievement (cuz it doesn't do anything else!), the experimental food trait must let them cook the food at home.
The favorite movie trait appears only after they watch a movie and declare their favorite movie type. After that they enjoy that type of movie more than other movies.
And I found a new trait. Is Adoptable. I have no idea what that does.