[DAO spoilers] wardens who made the ultimate sacrifice

So, I'm really into role-playing and getting into a character when I play these games. And I never once rejected Morrigan's ritual. I just think it's a great way out of a terrible situation! However, there's gotta be plenty of Wardens who didn't think so. I want to do a run with the sacrifice at the end, but every type of character that comes to my mind would agree to the ritual. So I decided to ask.

To the people whose warden made the ultimate sacrifice: who they were as a person? what were their main decisions in the game and by what they were motivated? why did they reject Morrigan's proposal? did they have a LI and what were their thoughts on leaving them alone? why did they want to make a final blow instead of Alistair/Loghain?