Wandering trader staring at things in players' houses

If wandering traders are NPCs that roam the world looking for interesting items to sell, it would make sense for their curious personality to be noticeable when they show up at a player's house.

The idea is that they could stare at the paintings, books in lecterns, items in frames or on armor stands, flowers in pots, etc. This would give him even more personality and it will be more entertaining to watch than taking free leash.

(This could also apply to villagers)