As far as disappointments go, I'm not really liking the straight male romance options. I liked DA:O and DA2's options much better.
I like Cassandra. In general I like religious types, since I myself am a religious person and try to make my primary player characters in these games religious. Dragon Age is pretty good with that; there's Cassandra, but also Leliana in DAO and Sebastian, the DLC character, for female player characters in DA2 (speaking of whom, it is worth noting that Sebastian
is a straight love interest in DA2).
I did enjoy romancing Morrigan in DAO, because mmmmmmm first of all, and secondly because there is some interesting character depth to her. I fully acknowledge that she's quite a bit of a sociopath and I would not try a relationship with her real life. That said, my import into DA2 and DAI did romance Morrigan; it was something like my 4th playthrough of DAO, a Dalish elf who wasn't quite supposed to be a reflection of myself.
Alistair makes for a "cute" romance for my female Warden playthrough, and I like how you can end up as his queen. No interest in Zevran.
DA2...bleh. Isabela makes for a kind of interesting character, but as a love interest? Stay 10 feet away from my bedroom, woman. I'd rather not go where half of Thedas has gone before. Merrill...she's not actively repulsive like Isabela, I just don't find her attractive. For femHawke, Anders and Fenris...meh. Sebastian is interesting, but I haven't actually finished a DA2 femHawke playthrough to find out how that ends.
Aveline was the most appealing female to me, and I tried to make advances on her...only to have the game pull the rug out from under me and make it so
she isn't interested in
me, no matter what I do. In one sense, it's a realistic approach to relationships -- not everyone is going to be open to a relationship with you, that's just life. On the other, it's a shame that it leaves the game with no interesting romances for my male Hawke, personally.
As I said already, I like Cassandra. Like, really, really like her. I like her devotion, her determination, her desire to make the Seekers and the Chantry better. Josephine I can see as an enjoyable romance as well. I foresee either Cullen or Blackwall as good romances for my femInquisitor. Sera can go jump in a Fade rift, as I've already talked about. Dorian is a great character, but that's just never going to happen in my playthroughs.
Iron Bull...you know, people talk like Iron Bull is the breakout character of DAI, but to me, he's the
least interesting of the whole bunch. Mildly entertaining. He's no Wrex, Mordin, Garrus, Varric, etc.