Which is your favorite alien in Ben 10?

My favourite alien is Cannonbolt because he was the first one to have Ultimate Form. He doesn't look aggressive, really. His claws are quite cute and I like his green eyes and the way his mouth quirks down at both sides. He moves in a jerky way and his body is chunky.

When you are Cannonbolt you can rush down the bad guys and then use your rolled up form like a ball to roll through obstacles.