Obviously Diriel for females - Rizdaer's an interesting character, but still, I got a thing for elves... and the romance *really* did manage to surprise me, even though I've read the previous "half-romance" before, so I knew about Tree talk. Until chapter 5, it was all I would expect, but after... heh, nicely done - my congratulations
Jaemal (and Peony also) were too sweet for me. I tend to hate such characters, and they were no exceptions. Also, Jaemal's flirts popped up twice as often as Diriel's, which was annoying - until I told him to keep off, of course
The most surprising thing, I really liked Salomeya's romance (I've just read it, because usually I don't feel like playing male characters). The final talk was just perfect, and I loved some of the other talks too. The ending though... disappointing, imho. I got a little bit carried away while reading the romance dialogues, and my imagination painted a grand dramatic love-hate story with a sad ending between Salomeya and PC starting after the end of the game, so simple "I left you and went to Waterdeep" seemed kinda too simple (and expected). Such a relationship needed quite a special type of male hero, though