Because you like Tom Reagan in Miller's Crossing
Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.
Faith has a chip on her shoulder and a stake in her hand to slay vampires in her town. See them in Buffy the Vampire Slayer.
Andy Bernard is a preppy Cornell grad who's very likely to break into an acapella performance. See them in The Office.
Aldo Raine is in the killing Nazi business. And as he says, business is a-boomin'. See them in Inglourious Basterds.
Those who stand against this singular super ninja are doomed to fail. See them in Ninja Gaiden.
Free-spirited Annie Hall goes through life saying "La-di-da, la-di-da, la la." See them in Annie Hall.
Sarah Kerrigan is pretty much the Queen Bitch of the Universe. See them in StarCraft .
Keeping your cool is just as useful in the underworld as in war, and Michael Corleone is stone-cold. See them in The Godfather.
Kumar Patel is always high, always hungry for sliders. See them in Harold & Kumar Go To White Castle.