if you are referring to shooting human subjects with tripod, what would you want to shoot so close to your subject and at so high angle? it will have distortion.
I was always under the impression that the camera must be pointing around face level? At least that's how I have been taking photos.
The tripod is mainly for taking family landscape photos (the cheapo one actually serves quite well for photos with no subject but as I mentioned, I'm worried it'll get blown over if I'm not manning it)
Another problem I faced previously is that say at a boardwalk, cos the space is quite limited and crammed, using a tripod that is too low will result in a photo that only shows the people in front (waist up to face) and not the scenery at the back.