Because you like Mary Jensen in There's Something About Mary

Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.

Terence Fletcher is a brutal and unflinchingly strict music teacher hell-bent on whipping his students into shape. See them in Whiplash.

A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.

GLaDOS will supply the food when you get together: a delicious cake. Of course, it could just be a trap so she can kill you. It’s hard to say. See them in Portal Series.

Bookish and socially anxious, Ruby Roundhouse is a teenager turned action heroine. See them in Jumanji.

Jack Bauer is a terrorist fighter who is scared of nothing and no one. The clock is ticking! See them in 24.

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.

They say they saved Adam Jensen by turning him into a cyborg, but he's not sure saved is the right word. See them in Deus Ex Series.

Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.

Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .