Because you like Chell in Portal Series

Lorelai Gilmore loves coffee, talking fast, flirting, movie marathons, and her daughter. See them in Gilmore Girls.

Rory Gilmore usually can be found with her nose in a book and coffee in hand, talking with her mom as quickly as the words can spill out. See them in Gilmore Girls.

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

Damon Salvatore used to miss being human. Now he can't think of anything more miserable. See them in The Vampire Diaries.