Red, black and cream is appealing to both sexes but for a small room may be a little overbearing, unless the majority were cream with Black and red touches.
If your room is small then decorate it so that it shows off the room best, as if it is decorated well then it will look professional.
My only tip though would be.....details. know its a pain to make sure theres no paint smudges etc and that everything is painted perfectly, but it should reflect your working style so it should be done as neatly as possible.