Dwarf noble and human noble are my favorites too. Then the human mage. I like how the human noble origin fits with the rest of the story, especially if you romance Alistair and become the queen.
I nearly always kill Loghain. My Cousland always kills him, she's always aiming for the throne.
I played two different versions of my canon after Landsmeet choice, based on killing of sparing him (it doesn't change the rest since Al is hardened and married Anora).
To clarify, my character was nearly driven mad by what happened in the Origin. Being a Warden and stopping the Blight is what saved him from madness and to recover.
Howewer, he suspected the fact that Howe got away after Cailan's death, and began suspecting that Loghain was involved after knowing his role in Eamon's poisoning (i know he's not involved with the Cousland. I never thought he was, but My knowledge isn't relevant To my characters). After seeing Howe with Loghain at the start of the Landsmeet quest, he thought his suspicion was true and decided to kill him.
Basically I roleplayed one time where he gave in to revenge and the other where his Warden's duty prevailed. I don't know which one to consider my canon, since Inloved equally how it ended.