Painting your walls in black will be a hit. But, you might have doubts around it. Can you repaint over it? Priming is a very important step when you go from light to dark, or opposite. It is the key to having a good color, and it also gives you the possibility to repainting later.
The best thing is that you can have different varieties of black. Although it does not sound like that, you can choose. You can use warm or cool tones. Warm ones have red and brownish hues.