Painting can change not only the appearance but the whole atmosphere of the house.  There are so many colors to choose from though, and it is not an easy task.  You may want to consider whether your house has a lot of natural light or is normally darkened.  Choosing brighter colors for darkened houses and darker colors for houses with a lot of light may work best.  Try to match what you already have in the home, such as furniture, drapery, etc. and bring a lot of samples home to help you decide.  A paint job can make the house look new and different and is well worth the work and expense. Also, another tip is to upgrade your shower head to a Wellness shower filter.