Now that u think about it, your right. Chris loves being Mario. Tyson loves being Daisy, Tyler loves being Blaze, and Spence loves being Luigi. That's all I've seen these guys play as almost the entire play through. I mean really, Tyson could have chosen someone like Yoshi or Shadow or Sonic or even Amy.
In 1v1 it's actually easier when your computer teammate takes the ball, because that way you can protect him the time it takes to get the ball in the hole. On the other hand, if you get the ball, he's really terrible at protecting you.