In DAO I did not think much about Cullen and of course did not choose to do what he asked either once the Circle was taken over. In DA2 I really did not like him and his attitude towards Mages, but I understood given his past involvement with them.
I really was unsure of how Cullen was going to be in DAI. I decided to romance him before the game came out because it was only the real option that interested me. I went with a female human mage and romanced him. In the end my reaction was “Holy Sh!t”
Considering how far Cullen has come over the Dragon Age years, I found his romance to be (almost) the best in any Dragon Age game.
It is amazing how in private Cullen is such a sweetheart to your character. He really comes through showing how much he loves and cares for your character-deeply. Cullen takes the relationship seriously and has no intentions (unless your character gives him a reason) to waver from that. The more you give yourself to Cullen the better the romance becomes.
Granted, the romance is not perfect (in my opinion) I was hoping the sex scene was a bit more intimate, giving a gift to Cullen, getting little love letters from Cullen found on your desk in the private quarters and not to mention being able to ask Cullen if he wishes to go to bed.
When I chose to play another run through the game, I cannot help but to romance Cullen all over again. I for one am definitely on the Cullen Fan train now.
Now, if we could only get added content of having the option of getting married…that would be awesome.