The chubby kid who has a real passion for food and is somewhat of a coward.
The F-word yelling white ethnic mafia wiseguy who is cold-hearted when killing people in brutal and gory ways, who grows into his organization until he betrays or is betrayed by others and find his end in an equally brutal way.
The intelligent and good-hearted scientist who is made captive of a crazy super villain and is forced to work on something ridiculously un-scientific which will bring some sort of super power or strenght, regardless of his warnings about it not being complete and under control. The whole thing colapses with him saying something like "I told you so!"
The substitute teacher who gets into a rough neighborhood school, working with the worse class possible, with good-hearted but mislead and lost students. The teacher is discredited by the comunity around, but gets to touch the heart of the students and make them learn ina different and fun way. One special troublesome kid finds his away, regardless of the abusive parents.
The juvenile person who gets back to medieval times for some reason, and uses portable technology and common knoledge to mislead people to think he or she is a wizard. Everyone on this 10th century steriotype of an era speaks an easily understandable modern english.