Because you like Mrs. Hudson in Sherlock
Ezio Auditore Da Firenze is a little short-tempered, a lot fun-loving. See them in Assassin's Creed Series.
Although Borat has a curious mind, he has no filter, and some very out of date views on just about everything. See them in Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan.
A vain and arrogant womanizer, Roy Mustang has hidden depths. See them in Fullmetal Alchemist.
Vash might act like a carefree, peace-loving goof, but it's not wise to underestimate this "Humanoid Typhoon." See them in Trigun.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
It doesn't matter how noble or brave he is. Jon Snow is a bastard, and people don't let him forget it. See them in Game of Thrones.
Cher Horowitz may have a problem with hubris, but she looks utterly fabulous while learning a lesson about the dangers of meddling. See them in Clueless.
While he might be too cool for school, Soul isn't too cool to do the right thing. See them in Soul Eater.
A vampire hunter, Integra Hellsing doesn't tolerate failure, least of all her own. See them in Hellsing.
The only thing Albert Wesker cares about is turning himself into a God. See them in Resident Evil Series.