... are probably coming to mind at first when thinking of Foley artists.
The right shoes, the right floors, the right walk in the right mood, the right scuffle at the right time... it's the details that make your characters (animals, too!) believable and add so much life to a soundtrack.
... are presumably the most underrated part. I'm firmly convinced that paying attention to subtle details in movements and material is totally worth it.
Nice cloth layers are important to glue picture edits, let you feel the actor's presence and thus help creating an impression of depth.
... are all the objects touched by the protagonists. Everything from the lightest cigarette drag to heavy gun handling and fights. And when I'm getting a fresh selection of vegetables, there might some bones being broken on screen...