It must provoke some sort of emotion in you. Art should provoke a visual stimulation. It doesn't matter if it's an original, a limited print or even a poster. If you don't like the image, don't buy it. Secondly, consider where you'll hang the picture.
Some images do well over sofas and couches, some are perfect for hallways or above a chair.
Some hang as feature pieces above a fireplace. Some are perfect compliments to offices or bedrooms. Try and imagine how it will look hanging on the wall. Other things to consider include the composition, the light, color, mood and texture. Each of these elements will help you narrow your choices.