Well, Cassandras romance was a pleasant surprise.
Iron Bulls romance was spectacularly boring. More often than not i forgot i was in a romance with him at all. S & M jokes are all well and good, but i need more to a romance than just "Hey lady, want to f***?"
Im told Solas has a decent romance, but i havent tried it yet, and it seems to only barely be a romance to begin with due to events beyond the players control. I look forward to trying it though.
Blandwall is Blandwall.
Id rather romance a fear demon than Sera.
Cullen is a bit too "Dreamboat" for me.
I literally forgot Josephine existed.
Dorian seems like fun.
Ultimately i feel like these romance options are incredibly weak overall. Sadly, one of the big problems with DA:I is that its a mile wide and an inch deep. These romances might be adequate for a 30 hour game, but all of my playthroughs have broken 100 hours. Its not enough butter spread on too much bread. That really hurts replay value for me.
That said, i enjoyed the game, and what little I got from Cassandra. Hopefully whatever dlc is in store adds some more romance content. New dialog, more setup, more options*, and all that.
*(Seriously, why exactly isnt Harding available? Or Varric so he can have a healthy relationship that dosent involve a woman he never see's, causes him no end of trouble, and is literally cheating on her actual husband?)