I am from and are living in Sweden but I like the desert in Erg Chebbi especially a little village Khamlia very much and are going there sometimes per year. There it is still silent, not so many hotels, not so many tourists, really nice place.
You can sit there only, talk with locals, look over the landscape, admiring the sunrise, or at sunset the whole landscape changes color from yellow to pink. Amazing it is.
It is worth to spend there more days in your holiday, near or directly in the sand dunes, take camel trip or drive around.