-I always considered every special action possible in each mission to be canon, and in the case where two special actions contradict one another/both cannot be earned in one playthrough, Corvo takes the action that causes less chaos (i.e. Helping Slackjaw Defeat Granny instead of Helping Granny Cook Slackjaw.) And this is at least partially supported by Dishonored II, which reveals that Corvo canonically retrieved his gear.
-I've mentioned this before, but just about every render I've seen of Corvo does him a disservice. From the Wanted posters and the Easy difficulty slider, it's obvious that Corvo is rather dashing; for a man of nearly forty he looks like he could be in his twenties. But the actual renders I've seen of him are rather creepy. He's still an awesome protagonist, but.
-Why wouldn't Daud use Corvo's gear? It's obviously of great quality. Maybe he's planning on selling it, as the assasins are? Maybe he thinks it'll get him a higher bounty when presenting Corvo to Havelock?
-The more I replay the game, the more missions I used to dislike (such as High Overseer Campbell and The Flooded District) gain favor with me. I don't know why. Maybe because I'm actually playing the game instead of watching somebody play it and I can appreciate the challenge and level design for myself? I don't know.
That's about it for now. I may or may not add to this.