I believe that depends on what sort of Pokemon you like! I honestly picked out my team on a bit of a whim, but if you had a specialty back home, then work with that!

For example, one of my friends was a user of fire-based alchemy where we come from, so the majority of his Pokemon are of the Fire type! And my alchemy is based around reshaping the earth, so my first Pokemon has the ability to create Earthquakes! It's quite fantastic!

That sort of thing!