One of my favorite decks to draft in Kaladesh is Blue-Red Aggro Energy. This is an extremely aggressive archetype that can spiral out of control with energy counters. Many of the core pieces, such as Janjeet Sentry, Thriving Grubs, and Spontaneous Artist, are all common, and you should be able to pick up multiples in drafts. Oftentimes you'll be able to play multiple creatures and give them haste in the same turn to surprise your opponent. While predominantly an aggressive strategy, you can certainly build a more controlling energy deck that aims to dominate the board position until you're able to finish the opponent off.