BEFORE PAINTING THE ROOM, READ BELOW.
One problem I find in picking the color you like is that once it is up on the walls it may not look the same as it did on the small paint sample card. Lighting is typically the reason for this.
To solve this problem, before painting on the wall, try buying a paint sample(s) of the color(s) you think you want. Paint it on a sample board that is available at hardware stores or you can even use poster board. After it has dried, place your sample on your wall. Look at it during the day, evening, low light, bright light, sunlignt or none. Move it to each wall. You will note it will probably look different depending on how the light is hitting it. Make sure the color is something you like in all light settings. It may take a couple colors before you find one you really like.
It is better to have painted a small piece of cardboard and decided you don't like the color than an entire room.

I had a customer just this week that had a blue they loved, but in certain lighting found it looked liked purple! Thank goodness it was on just a piece of cardboard!
