This is the first piece of a series of Targaryens that I'm about to make. There is little to be known about their appearances or how exactly they lived. In this one I'm focusing on the beginning of their House. Aeron is the oldest house member mentioned in the books and that is how imagined the first ones of them to be - strong,, resilient, tough, with scars and burned by fire. Mounting a dragon must have required a lot of hard work, therefore them being pristine and white doesn't sit well in my vision.
In this piece, Aenar took dragon hunting for new eggs from and encountered a huge wild female. Aenar's dragon is challending her to protect his rider.
"Lord Aenar Targaryen, known as Aenar the Exile, was a nobleman from the Valyrian Freehold. He is an ancestor of House Targaryen (...) because Aenar had moved his family away from Valyria, when the Doom finally came, the Targaryens were the only dragonlords to survive." source: http://awoiaf.westeros.org/index.php/Aenar_Targaryen