Wow! I had zero problem remembering my choices from DA2. It was DAO that had me scratching my head a few times.
(But then I don't think I've spent more than 20 minutes establishing any one of my world-states.)
Yeah for me it was that i remembered the main plot line and several side missions/companion quests, but the keep just offered a choice with minimal or no explanation. Like wether you attacked templars and killed them, made them leave or turned he mages over to the templars. I could remember the quest clearly...but not the outcome of my first playthrough, and because i did more then 1 playthrough with diff characters it became a fuzzy thing ;p.
But by starting DA:O i had access to the journal, and quest outcomes and minor detailing was all in there...not so much for DA II, there was barely anything in the log. Some choices of DA:O Awakening i couldnt remember for the life of me ;p, because i played through that DLC only once the my first char. Who the hell was Nathaniel? ;p, now i kind of remember with the help of the DA wiki.
That said, I loaded my DA:O+all DLC profile into DA II back then and i found out (just yesterday, because of the Keep system), that there was a glitch. I was supposed to meet Nataniel in DA II but never did, because the game registred him as dead (he wasnt, it's a known glitch ;p), I got the quest to help Yevhen and his 2 boys in Act 2. So when i turned both options on in the Keep, it gave me a promt that both choices together could not exist ;p. so had to figure that out too..
O well, i'm done now, and hoping they will not reset things when it goes public or whatever. If they do though, I know everything yet again ;p.