Well idk what 'right choice' is for what person but I went with choices that would benefit world...not me or my personal feelings.For example:
Dragon Age Origins/Awakening
-I hate guts of Bhalen but I always leave him as ruler.Simple reason is he is efficient ruler while Harrowmont mabye noble,nice,good and all he is horrible ruler.
So I went with politics irl...would we rather have leader that is good and noble but is incompetent and makes people and it's country suffer for his incompetence or would we have leader that is not that nice and is scumbag by all means but he is competent and both country and people gain a lot with no losses plus condition is greatly improved?Well I would rather have personally leader that knows what to do rather then leader full of ideals that he can't complete.That is why Bhalen gets my vote to be king always despite my personal feelings for him.
-I hate Anora as well but I make her and Alistair married and yes I leave Loghain alive as well.Why?Anora as much as I dislike her is good ruler and once again she is competent one in here and Alistair has only claims to throne by his blood but doesn't know at thing about ruling.Reason why I bring them together is...Alistair is Marric's son and lot of people respect that while Anora is competent leader and has experience...if I leave Alistair as alone king or even marry my warden to him we get king that doesn't know how to lead and warden that despite being hero and all she is still not Anora(as much as I hate to admit that)which means she is symbol people respect her but hey "to rule contry" is what is needed of king/queen plus two wardens can't have kid which each other which means that possibility of having heir to throne which is key...is impposible.Or if we leave only Anora problems when it comes to government won't be problem for her in fact there will be no problems but lots of people respect Marric's bloodline and to have Anora alone in what Marric built...doesn't seem right.That is why I get Anora and Alistair together since it's best political move...as for why Loghain is alive well you have to understand while he is traitor he is is/was Ferelden's greatest hero plus he is best military brain...besides honestly if we will go "by our emotion decision" I don't have reason to want to kill Loghain.Cailen I never liked he seems like some random brat fool that has his head stuck up in clouds rather then reality while he was 'playboy' around Anora was left with dealing with country.Duncan I did liked but still I didn't know him like Alistair to go 'rampage' over his death...and honestly let's just say Duncan's "Join Wardens now or I won't save you" kinda made me wanting to give him good punch as much as I was in love with that guy
.So angry for Duncan's death...yes...angry for Cailen...no in fact I wanted to give Loghain personal thanks for that one 
-Other minor decisions were:let urn be,everyone alive and well,mages get to live Cullen becomes lunatic it seems
,werewolves's curse is broken,connor/isoled,Morrigan had baby,and in DLC's I got both keep/city protected in short everyone is alive.
As for DA2 only decision that was most mayor for me at least(beside side with templars/mages and decided what fate awaits your sister/brother) was should I give Isabela to qunari or no.First I don't have problems giving her at all
but if I do wench will escape and steal tome again...while if I save her and kill Arishok(after long embarrassing battle) at least qunari get tome back...so as much as I hate myself for doing this...I end up saving Isabela
because as I said I don't let my personal feelings to get involved I do what I feel it would be best and qunari with tome rather with none is better.As for brother/sister I make them Grey Wardens and side with mages unless I want to be viscount then I'm forced to be with templars 
Still that is how I play/chose and think and this is world state I plan to have when I start playing Inquisition.Were my decisions right or wrong,good or bad...I don't care how someone else sees them but in my opinion my decisions were perfect for me.