A low angle will cause your subject to look taller and put more sky in the picture. A high angle can eliminate the sky or ugly light fixture. Experiment by shooting the same subject from different angles. Lighting Photographers train themselves to look for the best light in each situation. It can be found from sunrise to mid-morning and from late afternoon to sunset.
Cloudy days are great for photographing people.
The light is muted, and there is no squinting. If you do take pictures in bright sunlight, use your flash. It will erase the harsh shadows on your subject's face and add detail and sparkle to your picture. Also, watch for long shadows that fall in front of and behind your subject or include the sun in your picture. You can transform everyday events into wonderful images by using light as an element.