I just came back yesterday also! I've completed Kanto and is currently working on Hoenn. While at it, I also farm some money on the Islands and breed a Skarm before I head back to continue my Hoenn adventure. You should check out the Hoenn region (I guess you haven't because you said you stopped playing for two years). While doing that, also join a team so you can have friends in-game. After you have completed Hoenn, it's up to you to do whatever you want. Become the richest player or climb the competitive ladder and claims the top position. Or even both, if you are up to the challenge!