New paintings/pictures you'd like to see added to buy mode.

I would like more collages and stuff like that. Rustic or country is always a plus for me because I'm obsessed with all things rustic.

Have you tried looking on the Gallery for rooms with paintings? There are tons of rooms with paintings and pictures people have shared. They're usually of things in the game but sometimes it will say your house has CC in it when it doesn't. @rosemow has some really beautiful paintings. She also has a thread in the Creative Corner here on the forums with her showcase.