Because you like Bill Haverchuck in Freaks and Geeks
Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.
Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.
Kyoya Ootori is possibly the only person who could reasonably go from VP of a school club to ruling the world. See them in Ouran High School Host Club.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
Greenpeace? No, this brave eco-terrorist is waging Greenwar. See them in Final Fantasy Series.
There are men who embrace destiny and do not show their fear. These are the ones that change the world forever. See them in Dragon Age Series.
Rayman is a fearless hero who flies into action with a propeller on his head and a smile on his face. See them in Rayman.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
A few millennia in the mortal realm have caused DEATH to be quite enamored of life. See them in Discworld.
Nemo is a small fish in a vast ocean, but he dreams of seeing it all. See them in Finding Nemo.
Whether he's fighting or flirting, Jace Wayland is all swagger. See them in City of Bones.