When we moved in, our entire house was painted Realtor Beige, which was... okay... completely inoffensive, and I never thought about it. Jenna just painted some walls, and what a difference it makes!
Paisley got a room of her own (formerly the craft room) with two blue accent walls. Natalie got the full treatment with everything pink. Ever the contrarian, she took one look around and announced, "it looks the same."