Well, we're already starting out under the direct control of the dragon god of our choosing, so being a Princeable won't actually change all that much.

Personally, I feel the best way to ensure that players can enjoy the power granted to them is to have them [i]start[/i] out as strong as a dragon Servant (complete with your own very specific domain and occupation), and going upwards from there.

 There's little call for a slow climb in power in a freeform RP, since that usually means the most fun parts are slated to begin long after the players have gotten bored with fighting for scraps at the bottom of the hierarchy.