SFM Sonic the Hedgehog: Nomadic Metal

What would you do if you awakened to emotions known to be impossible to have and rethink everything? Well, some would become nomads and search for their meaning in their new found lives.

Yes, in a small head-canon of mine. Metal Sonic awakens to unknown emotions after a fight with Sonic. Seeing as he now sees Eggman as the real villain and all his attacks weighing heavily on him, he leaves Sonic and his friends to search for his meaning in his new found free life.