Tassiaw wrote...
"IS THAT DEATH YOU'RE WEARING?! IT REALLY SUITS YOU!!!"
I love Alistair, but god damn that's incredibly annoying.
Oh my god, yes! I was just looking to see if anyone else had posted this yet. My thoughts exactly!
Unfortunately, this dialogue option is unavailable in game: "I love you Alistair, but if you say that one more time I'm going to make you sleep with Morrigan at the end of this playthrough. No joke."

I'd like to add my vote to:
Isolde saying "Teegan"
"Can I get you a ladder? So you can get off my back?"
Dog barking - While getting solicited for tent-time with Alistair, I may have actually said out loud, "Oh my god! I'm trying to get laid here! Will you SHUT UP!"
Oh, and also, when Morrigan's talking about fooling local law in forcement when someone in a village called her a witch. She say's "Child's Play" reeeeally weird at the end of a sentence. I cringe every time.