My main problem with romances usually revolves around time. I'm sitting there for some hours on end at a time, but probably for one play through it lasts about a week. I realize that in game terms a whole bunch of time has supposedly passed, but for me the progression from friend to something else happens so fast that I'm just irritated at it. No, I dont really love you. Go away.
I can see friendships developing, sure. Getting out of tight spots together can generate that camaraderie, fine. But the insta-romance just leaves me wishing they had spent the precious commodity called time on more monsters, more areas, or more quests. Or all three. At least with those I know I will get some use out of them, even in multiple playthroughs.
I understand there are those who like the romances. I get it. I just think of romances like...an appendix. There, but kind of useless and occasionally getting red, angry, and rupturing my gameplay.