Here's the deal, you get to live in the Pokemon world (finally), but you are only guaranteed to travel and live in one region. You also are given the option to pick a starter from the region's typical choices, and from there you can do whatever you want. So answer the following:
>Region of choice?
>Starter of choice?
>Goal/Life?

For me, I'd have to go with Sinnoh, and pick Turtwig. I'd be pretty generic with my ambitions, taking on the gyms, trying to win the league, completing the pokedex, but I'd like to work for Rowan by the end of things and live in Jubilife City.