Sure, Metal was made to get rid of Sonic and do what Eggman wanted, but Sonic had managed to show him there's more than just that. Even if he had his orders and his programs he was able to think on his own, despite Eggman's best attempts at stopping that, and Sonic showed him that he could choose his own path.
Sure the blue blur was annoying, but after what had happened recently, Metal had no one else to turn to... So he went to find Sonic.
A lazy afternoon was something Sonic didn't mind having. It was boring just peaceful and nothing to fight, or to have to deal with, which meant he could have some time to himself...
He was outside in a hammock at the place he was staying at near the beach, sunbathing without a care in the world when something suddenly blocked out the sun and distrubed the resting hedgehog...
Sonic takes his shades off and looks up at what was blocking the sunlight... Only to find Metal Sonic staring him in the face. This was sudden and startled the hedgehog, which ended him on the ground near the swinging hammock.
"Geeze Mets... You nearly gave me a heart attack!" Sonic comments as he gets up, picking up his shades and looking over at the robot.
"I don't see how that could have given someone of your health a heart attack..." Metal simply replies, looking confused.
"Its an expression, you know? A saying? Anyway, what are you doing here? Most times we meet it doesn't normally end up being at my home."
"Well..." Metal starts, looking down at the ground. "I deserted the Doctor and I came here to stay. I don't want to be around the doctor anymore. Last time I second guessed his orders he threatened to dismantle me."
"Uh huh..." Sonic scratches at his ear a bit while he thought about this. "I guess you can stay here for awhile. Just don't cause any trouble. I don't know how Tails and the others would react to coming over and spotting you here... Last thing I want is you to have to be on the receiveing end of Amy's hammer..."
"I won't cause any trouble. I'll only stay as long as I need to in order to figure out what option I should take next. I am not use to being able to choose what I do." Metal replies, watching Sonic.
"I should probably show you around then. Its my house after all! Come on, I can get back to napping later. The sun's not going anywhere." Sonic gestures for Metal to follow him as he heads towards the house.