It is so frustrating to finish painting a room and realize you don't like the color. In this case I actually did like the color - it just wasn't working in this room. The color was Restoration Hardware's "slate" and it is a grey/green color. The only problem was - I didn't like it with the black, white, and blue I already had in my pillows, rug, draperies, etc. I think I will use the color in my downstairs family room because it will go well with the golds, browns, and reds I have down there. I rarely love a color as soon as I am done painting because it always takes some getting used to. Once I move furnishings back into a painted room and live with it for a day or two I end up loving it. After moving furnishings back into this room and living with it a couple days I admitted the ugly truth that I didn't love it and it would have to eventually be repainted. UGH! But now, I am so glad I admitted my mistake and fixed it. I LOVE it now and everything works (pillows, rug, etc.) much better.
The new color is a very boring and basic neutral light grey (same color as my hallway - Benjamin Moore "Ozark Shadows" lightened 50%) but I'm confidant I will never get sick of it or have to change it again. Because it is so neutral it provides a nice backdrop for everything in the room now and whatever else may go into it later.
My advice is after you paint and get used to it a little while if you don't love it don't just settle and live with it - change it! It is a pain but definitely worth it!!!! Someday I hope to LOVE every room in my house.