You will awake in the body of an adult dragon of the genus (chromatic, imperial, metallic, primal, etc.) and species (red, sky, gold, lava, etc.) of your choice inside of the lair you were hibernating in.
As an adult dragon, you are around 180 years old. You will reach the peak of your power at 1200 years of age, past that point you will stop aging and can live for eons. Because of their vast lifespans, dragons rarely die of old age.
When choosing any powers that improve with skill, you can split up to 150 years of experience between them to represent the knowledge acquired over your long life. Any magical or mystical powers you possess will be measurable more powerful as your reserves are larger.
The size of your body depends on your exact species but is between 20 and 30 ft. in height and 15ft. of length excluding your neck and tail (where it would be around 30 ft.). You weight between 10 and 15 tons. You are strong enough to destroy concrete buildings with ease however your large bulk slows you down.
In addition to your powerful and tough body, you possess a number of innate abilities. Flight with your powerful wings and a breath of an element corresponding to your species as well as the ability to shapeshift into a human (or other) form at will.