Because you like Clark Kent in Smallville

Despite Norman Bates' typically kind and shy personality, he is also prone to occasional violent outbursts. See them in Bates Motel.

Alex Danvers is a brilliant engineer tasked with alien threats, and one of those aliens is her adopted sister Supergirl. See them in Supergirl.

Andy Bernard is a preppy Cornell grad who's very likely to break into an acapella performance. See them in The Office.

Christian is a romantic who for some reason won't stop singing everything he feels. See them in Moulin Rouge.

Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.

Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.

Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.

Ted is a cursing, smoking, drinking teddy bear who's anything but cuddly. See them in Ted.

Carol Aird is driven to fight to make her life better, regardless the consequences. See them in Carol.

Cinderella will sacrifice herself to keep her family's memory alive. See them in Cinderella (Live Action).

A singing nanny, Mary Poppins is practically perfect in every way. See them in Mary Poppins.

This android may not have emotions, but Lt. Commander Data's curiosity about humanity is endless. See them in Star Trek: The Next Generation.