I know what you mean "Mustapha" whenever i'm in doors the pictures don't turn out as good. the problem was I turned the flash off on purpose. when I was inside the buildings. alot of the vendors where getting mad at me for taking pictures of there tables. so I kept the flash off so not to draw atention to myself.
If the flash was on I think alot of the pictures would have turned out better.
Besides, having the flash off allows me to take more pictures.
Sometimes when taking pictures with strangers caught in them. The strangers get mad at you. So in some of the pictures I just simply lifted the camera and took a quick picture before anyone noticed. If I took more time I think the pictures would've turned out better.