Ian Somerhalder stars as Damon Salvatore on the CW's The Vampire Diaries.  Damon is the older of the two vampire brothers and is definitely the darker of the two.

He's spent most of his life trying to resurrect a vampire he fell for in 1864, Katherine. But he has developed feelings for Elena, creating a quasi love triangle on the show.

Damon Salvatore Quotes

Damon: I'm not a hero, Elena. I don't do good. It's not in me.
Elena: Maybe it is.

You want a love that consumes you. You want passion and adventure, and even a little danger... I want you to get everything you're looking for. But for right now, I want you to forget that this happened. Can't have people knowing I'm in town yet. Goodnight, Elena.

Damon

Vampire Diaries Quotes

We met and we talked and it was epic. But the sun came up and reality set in.

Elena

Damon: I'm not a hero, Elena. I don't do good. It's not in me.
Elena: Maybe it is.