Maker's Breath.... (Official Cullen Rutherford discussion)

I always take all the flirt options available from the beginning. The only thing i do that slows down the pace is that i finish the Perseverance quest before triggering the first kiss cutscene, that way the inquisitor helps him with the lyrium problem and knows about his past before starting the romance (and i like the "awkwardness" and the intensity between the two that is shown in the cutscenes for that quest, if it`s done first. They show that they care about each other but at the same time they still remain in the friend zone). It also makes some minor changes in the dialogue in the battlements cutscene (after we told Cullen to stop drinking lyrium):

If Perseverance is done after the first kiss:
Inqui: For what it`s worth, i like who you are now.
Cullen: Even after...?
Inqui: Cullen, i care about you. you`ve done nothing to change that.

If Perseverance is done before the first kiss:
Inqui: For what it`s worth, i like who you are now.
Cullen: Even after...?
Inqui: I`m serious.